feat(OEIS): A087719 #1894
Open
feat(OEIS): A087719 #1894
+83
−0
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Paul-Lez
reviewed
Jan 26, 2026
Co-authored-by: Paul Lezeau <paul.lezeau@gmail.com>
mo271
reviewed
Jan 26, 2026
mo271
reviewed
Jan 27, 2026
Comment on lines
+74
to
+76
|
|
||
| /-- The formula value. -/ | ||
| def formula (n : ℕ) : ℕ := 3 ^ n + 3 * 2 ^ n + 6 |
Collaborator
There was a problem hiding this comment.
Suggested change
| /-- The formula value. -/ | |
| def formula (n : ℕ) : ℕ := 3 ^ n + 3 * 2 ^ n + 6 |
This not used anywhere, right?
I think it is better to inline this
mo271
approved these changes
Jan 27, 2026
Collaborator
mo271
left a comment
mo271
left a comment
There was a problem hiding this comment.
Thanks, lgtm, only this one suggestion
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Resolves #1460.
Conjectures associated with A087719
Define$\varsigma(n)$ the smallest prime factor of $n$ ($a_n$ be the least$k \le a_n$ with $k > \varsigma(k)^n$ exceeds the count$k \le \varsigma(k)^n$ .
Nat.minFac). Letnumber such that the count of numbers
of numbers with
The conjecture states that$a_n = 3^n + 3 \cdot 2^n + 6$ for $n \ge 1$ .
References: oeis.org/A087719
Note: I'm using Claude + Opus for supervised formalization tasks. Claude has no permission to use git on my machine.