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.
%I A108288 #7 May 30 2023 20:23:50 %S A108288 1,3,28,455,10626,324632,12271512,553270671,28987537150,1731030945644, %T A108288 116068178638776,8634941152058949,705873715441872264, %U A108288 62895036884524942320,6067037854078498539696,629921975126394617164575,70043473196734767582082230 %N A108288 Main diagonal of table A060543; a(n) = C((n+1)^2-1, n*(n+1)). %F A108288 a(n) = A060545(n+1). - _R. J. Mathar_, Aug 24 2008 %o A108288 (PARI) a(n)=binomial((n+1)^2-1,n*(n+1)) %Y A108288 Cf. A060545, A108267, A060543, A108289. %K A108288 nonn %O A108288 0,2 %A A108288 _Paul D. Hanna_, May 31 2005