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 A186911 Number of (n+2)X7 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order 1

%I

%S 319741716426,52666517720011,4805827783188400,300268014063911584,

%T 14077041692560748494,522748636954347087650,15954040054059557650482,

%U 411179480114108991321807,9138537360691131917393508

%N Number of (n+2)X7 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

%C Column 5 of A186915

%H R. H. Hardin, <a href="/A186911/b186911.txt">Table of n, a(n) for n = 1..120</a>

%H R. H. Hardin, <a href="/A186911/a186911.txt">Polynomial of degree 107</a>

%F Polynomial of degree 107 in n, see link.

%e Some solutions for 4X7

%e ..0..0..0..0..0..0..2....0..0..0..0..0..1..2....0..0..0..0..0..0..2

%e ..0..0..0..0..0..0..3....0..0..0..0..0..2..3....0..0..0..0..0..1..4

%e ..0..0..0..0..0..4..0....0..0..0..0..0..5..4....0..0..0..0..0..1..4

%e ..0..0..0..0..0..5..2....0..0..0..0..0..5..5....0..0..0..0..0..6..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 28 2011

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Last modified January 24 13:24 EST 2020. Contains 331193 sequences. (Running on oeis4.)