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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.

A221070 Sum of neighbor maps: number of n X 6 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their king-move neighbors in a random 0..3 n X 6 array.

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%I A221070 #5 Jun 26 2025 13:36:16
%S A221070 64,476,262144,16777216,811440640,68719476736,4398046511104,
%T A221070 275046044778496,18014398509481984,1152921504606846976,
%U A221070 73666094089946267648
%N A221070 Sum of neighbor maps: number of n X 6 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their king-move neighbors in a random 0..3 n X 6 array.
%C A221070 Column 6 of A221072.
%e A221070 Some solutions for n=3
%e A221070 ..0..0..0..1..1..1....0..0..1..0..1..0....0..0..0..0..0..0....0..1..0..0..0..0
%e A221070 ..1..0..0..1..1..1....0..0..0..0..1..0....0..0..0..1..1..0....1..1..0..0..0..0
%e A221070 ..1..0..0..0..1..0....1..0..0..1..1..1....1..1..0..0..1..1....0..0..0..0..1..1
%Y A221070 Cf. A221072.
%K A221070 nonn
%O A221070 1,1
%A A221070 _R. H. Hardin_, Dec 31 2012

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