Hi @mortonjt , shouldn't it be `A[i - j, i - 1]` instead of `A[i - j, 1 - 1]` (1 becomes i in the second argument)? https://github.com/flatironinstitute/deepblast/blob/a6e98c378b2d8ea85990b0460467e6516c6d6808/deepblast/nw.py#L58