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 A159446 #6 Jun 02 2025 01:38:18 %S A159446 46,940414,12435615362,267605432073483,5530118542908066196, %T A159446 96265168673124122816296,1271053160554759403029873140, %U A159446 11717124833455944884494778389078 %N A159446 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 40. %K A159446 nonn %O A159446 3,1 %A A159446 _R. H. Hardin_ Apr 11 2009