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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.

A219145 Unchanging value maps: number of 4Xn binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array.

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%I A219145 #5 Jul 23 2025 00:16:29
%S A219145 1,51,331,1774,10505,59127,341648,1963817,11341895,65406069,377314947,
%T A219145 2175983774,12550566460,72389111386,417539600863,2408347532016,
%U A219145 13891206637891
%N A219145 Unchanging value maps: number of 4Xn binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array.
%C A219145 Row 4 of A219142
%e A219145 Some solutions for n=3
%e A219145 ..0..0..1....0..0..0....0..0..1....0..1..0....0..0..0....1..0..0....0..0..0
%e A219145 ..0..0..1....0..0..1....1..0..0....0..0..0....0..0..1....1..0..0....0..0..1
%e A219145 ..1..0..0....1..0..0....1..0..1....1..0..1....1..0..0....1..0..0....1..0..1
%e A219145 ..0..0..1....0..0..0....1..1..1....0..0..1....1..0..1....1..0..1....1..1..1
%K A219145 nonn
%O A219145 1,2
%A A219145 _R. H. Hardin_ Nov 12 2012

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