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 A159442 #6 Jun 02 2025 01:37:52 %S A159442 176,579520,9274410900,155585532378608,2558195695707142700, %T A159442 34698992555435783306076,349717517779492989132690460, %U A159442 2414282978575598517037579242048 %N A159442 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 38. %K A159442 nonn %O A159442 3,1 %A A159442 _R. H. Hardin_ Apr 11 2009