cp's OEIS Frontend

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.

A206502 Number of nX5 0..7 arrays with no element equal to another within a city block distance of two, and new values 0..7 introduced in row major order.

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%I A206502 #6 Jul 22 2025 19:29:23
%S A206502 5,481,178998,83045488,38638317841
%N A206502 Number of nX5 0..7 arrays with no element equal to another within a city block distance of two, and new values 0..7 introduced in row major order.
%C A206502 Column 5 of A206503
%e A206502 Some solutions for n=4
%e A206502 ..0..1..2..3..0....0..1..2..0..1....0..1..2..0..1....0..1..2..3..0
%e A206502 ..2..3..0..1..2....2..3..4..5..6....2..3..4..5..2....2..3..0..1..2
%e A206502 ..4..5..6..4..7....1..5..7..1..2....4..0..1..6..3....4..5..6..7..3
%e A206502 ..0..7..1..5..3....0..2..3..0..4....1..2..3..7..4....1..7..2..0..4
%K A206502 nonn
%O A206502 1,1
%A A206502 _R. H. Hardin_ Feb 08 2012