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 A223761 #5 Jul 23 2025 04:29:02 %S A223761 1163,1352569,477860225,70657105931,5733827943118,298630624023222, %T A223761 10962346407561257,301938629597593741,6529314611297747401, %U A223761 114748898336983659524 %N A223761 Number of nX7 0..3 arrays with rows, antidiagonals and columns unimodal. %C A223761 Column 7 of A223762 %e A223761 Some solutions for n=3 %e A223761 ..0..0..0..0..0..3..2....0..0..0..0..3..3..2....0..0..0..0..3..1..0 %e A223761 ..0..0..0..0..3..3..3....0..0..0..0..2..2..3....0..0..0..0..1..3..1 %e A223761 ..0..0..0..0..1..1..3....0..0..0..0..1..2..0....0..0..0..1..1..2..3 %K A223761 nonn %O A223761 1,1 %A A223761 _R. H. Hardin_ Mar 27 2013