A161137 Main diagonal of the triangular array A161135.
1, 2, 5, 9, 37, 86, 232, 748, 932, 2865, 17761, 109780, 249840, 1190787, 3869645, 6479631, 69445201, 75334942
Offset: 1
Formula
a(m) = A161135(m,m)
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.