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 A254163 #6 Jul 23 2025 14:28:57 %S A254163 16240,164408,1553720,13514192,119471400,1054310240,9378850720, %T A254163 83642043104,747838723984,6692350328688,59911130123536, %U A254163 536370198043600,4802059524173712,42992172686208464,384902922582518096 %N A254163 Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally. %C A254163 Column 3 of A254168 %H A254163 R. H. Hardin, <a href="/A254163/b254163.txt">Table of n, a(n) for n = 1..210</a> %H A254163 R. H. Hardin, <a href="/A254163/a254163.txt">Empirical recurrence of order 66</a> %F A254163 Empirical recurrence of order 66 (see link above) %e A254163 Some solutions for n=2 %e A254163 ..0..1..1..0..0....0..0..1..0..0....0..1..1..1..0....0..0..0..0..0 %e A254163 ..0..1..1..1..0....1..1..1..0..1....0..0..1..1..0....1..0..1..0..1 %e A254163 ..1..1..0..0..1....0..1..0..0..1....1..1..1..1..1....0..1..0..0..1 %e A254163 ..0..0..0..0..0....1..1..0..0..0....0..0..0..0..0....0..1..0..1..0 %K A254163 nonn %O A254163 1,1 %A A254163 _R. H. Hardin_, Jan 26 2015