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 A254170 #6 Jul 23 2025 14:29:44 %S A254170 16240,164684,1553720,15016048,139009432,1263003480,11377995944, %T A254170 101942555352,912087664152,8157975853920,72998908371792, %U A254170 653365654458064,5848836175265568,52361520959776576,468779045407612304 %N A254170 Number of (3+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally. %C A254170 Row 3 of A254168 %H A254170 R. H. Hardin, <a href="/A254170/b254170.txt">Table of n, a(n) for n = 1..210</a> %H A254170 R. H. Hardin, <a href="/A254170/a254170.txt">Empirical recurrence of order 73</a> %F A254170 Empirical recurrence of order 73 (see link above) %e A254170 Some solutions for n=2 %e A254170 ..0..0..0..0....0..0..1..1....0..1..1..1....1..1..1..0....0..1..1..0 %e A254170 ..0..1..1..1....1..1..1..1....1..1..1..1....1..0..1..1....1..0..0..0 %e A254170 ..1..1..0..0....1..1..0..0....1..1..1..0....1..1..0..0....0..0..1..0 %e A254170 ..0..0..0..1....0..0..0..1....0..1..0..0....0..0..0..0....0..0..1..0 %e A254170 ..1..0..0..0....0..0..0..0....1..0..0..1....1..1..1..1....0..0..1..1 %K A254170 nonn %O A254170 1,1 %A A254170 _R. H. Hardin_, Jan 26 2015