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 A218903 #9 Jul 23 2025 00:09:18 %S A218903 128,614,19046,202662,3960146,57116962,969423130,15356153490, %T A218903 251663556436,4077991415492,66396374393108,1080532144058480, %U A218903 17582607376407152,286281574650809374,4659426319356860956 %N A218903 Number of 7Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random 0..1 7Xn array. %C A218903 Row 7 of A218897 %H A218903 R. H. Hardin, <a href="/A218903/b218903.txt">Table of n, a(n) for n = 1..35</a> %e A218903 Some solutions for n=3 %e A218903 ..1..0..1....0..0..1....1..0..0....1..1..1....0..0..1....0..0..0....1..0..0 %e A218903 ..1..0..0....0..0..1....1..0..1....0..0..0....0..0..0....0..0..1....0..0..0 %e A218903 ..1..0..0....1..0..1....0..0..1....0..0..0....0..0..0....1..0..1....0..0..0 %e A218903 ..1..0..1....1..0..1....1..0..0....0..0..0....0..0..0....0..0..1....0..1..0 %e A218903 ..1..0..1....0..0..0....0..0..1....1..0..0....1..0..0....0..0..1....0..0..0 %e A218903 ..0..0..0....0..0..1....0..0..0....0..0..0....1..0..1....1..0..1....0..1..0 %e A218903 ..1..0..0....0..0..0....1..0..1....0..0..1....0..0..1....1..0..0....1..1..1 %K A218903 nonn %O A218903 1,1 %A A218903 _R. H. Hardin_ Nov 08 2012