A133402 Hankel transform of A006588.
1, 96, 405504, 77007421440, 661630022502580224, 257876005135691663309537280, 4565900567740737406606787243126292480, 3675506444195600567841408683430769715388692299776
Offset: 0
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.