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 A240446 #16 Feb 20 2024 00:45:26 %S A240446 32,6726,166702,1895938,13790212,74380406,322961410,1188292304, %T A240446 3835115230,11126671552,29549197210,72828900336,168386628278, %U A240446 368360769558,767733010896,1533170797506,2947620125778,5477517677094,9871827636572,17305042166112,29579923394356,49410229230976,80809088567212,129615220384928,204196987161028,316383511891814,482682961875178,725860819178050 %N A240446 Numbers of ways to place six indistinguishable points on an n X n square grid so that no four of them are vertices of a square of any orientation. %F A240446 a(n) = (n^12 - 15*n^10 + 55*n^8 + 75*n^6)/720 + O(n^4). %Y A240446 Cf. A240444, A240445. %K A240446 nonn %O A240446 3,1 %A A240446 _Heinrich Ludwig_, May 09 2014 %E A240446 a(12)-a(14) from _Heinrich Ludwig_, Dec 01 2016 %E A240446 a(15)-a(30) from _Max Alekseyev_, Feb 19 2024