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 A216942 #5 Jul 22 2025 23:36:58 %S A216942 5908,13312100,15316983096,10284525151080,4389382785819252, %T A216942 1268055011723293820,260484745143941231864,39597325855709416301028, %U A216942 4603852061946934725284100,420900936677935417159765108 %N A216942 Number of side-6 hexagonal 0..n arrays with values nondecreasing E, SW and SE. %C A216942 Row 6 of A216937 %e A216942 Some solutions for n=1 %e A216942 ............0.0.0.0.0.0......................0.0.0.0.0.1 %e A216942 ...........0.0.0.0.0.0.0....................0.1.1.1.1.1.1 %e A216942 ..........0.0.0.0.0.0.0.0..................0.1.1.1.1.1.1.1 %e A216942 .........0.0.0.0.0.0.0.0.0................0.1.1.1.1.1.1.1.1 %e A216942 ........0.0.0.0.0.0.0.0.0.0..............0.1.1.1.1.1.1.1.1.1 %e A216942 .......0.0.0.0.0.0.0.0.0.0.0............1.1.1.1.1.1.1.1.1.1.1 %e A216942 ........0.0.0.0.0.0.1.1.1.1..............1.1.1.1.1.1.1.1.1.1 %e A216942 .........0.0.0.0.1.1.1.1.1................1.1.1.1.1.1.1.1.1 %e A216942 ..........0.0.0.1.1.1.1.1..................1.1.1.1.1.1.1.1 %e A216942 ...........0.0.1.1.1.1.1....................1.1.1.1.1.1.1 %e A216942 ............0.1.1.1.1.1......................1.1.1.1.1.1 %K A216942 nonn %O A216942 1,1 %A A216942 _R. H. Hardin_ Sep 20 2012