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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.

A201694 Number of n X n 0..2 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards.

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%I A201694 #8 Jul 22 2025 16:18:57
%S A201694 3,10,116,4998,930564,795339012,3262897246338
%N A201694 Number of n X n 0..2 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards.
%C A201694 Diagonal of A201700
%e A201694 Some solutions for n=3
%e A201694 ..0..1..2....1..1..2....0..0..2....0..2..2....0..2..2....0..1..2....0..1..2
%e A201694 ..0..2..0....1..2..1....0..2..0....0..2..2....1..0..2....2..0..2....2..1..1
%e A201694 ..1..0..0....2..1..1....2..1..0....2..0..0....2..2..1....2..2..1....2..2..0
%K A201694 nonn
%O A201694 1,1
%A A201694 _R. H. Hardin_ Dec 03 2011

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