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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.

A229773 Number of n X n 0..5 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

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%I A229773 #6 Jul 23 2025 05:46:45
%S A229773 6,266,103222,637396928,81937334158292,245200063296427870294,
%T A229773 18316874320807782299001320802
%N A229773 Number of n X n 0..5 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.
%C A229773 Column 5 of A229774
%e A229773 Some solutions for n=3
%e A229773 ..4..1..0....2..1..1....4..2..0....1..1..0....3..2..2....2..1..0....2..0..0
%e A229773 ..4..1..4....2..5..1....4..4..2....2..1..4....3..5..0....3..4..2....3..5..2
%e A229773 ..5..3..0....5..3..1....5..1..2....3..3..3....5..2..1....5..2..1....4..1..4
%K A229773 nonn
%O A229773 1,1
%A A229773 _R. H. Hardin_, Sep 29 2013

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