A054095 T(n,n-3), array T as in A054090.
1, 10, 22, 108, 544, 3370, 24030, 195172, 1777648, 17950554, 199059670, 2405063020, 31448531952, 442501797658, 6666753146494, 107081325959940, 1826636018849440
Offset: 3
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.