cp's OEIS Frontend

A183718 1/20 of the number of (n+1) X 9 0..4 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease.

%I A183718 #7 Oct 06 2015 22:00:08
%S A183718 985,18566,303170,5374440,94463507,1680902120,29887741084,
%T A183718 532844962952,9498797049301,169444214222538,3022597001362206,
%U A183718 53927539247910656,962146234750661827,17166919088214504572,306297928172424966016
%N A183718 1/20 of the number of (n+1) X 9 0..4 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease.
%C A183718 Column 8 of A183719.
%H A183718 R. H. Hardin, <a href="/A183718/b183718.txt">Table of n, a(n) for n = 1..156</a>
%e A183718 Some solutions for 3 X 9:
%e A183718 ..0..2..0..1..0..2..0..2..1....0..3..0..4..0..3..4..3..0
%e A183718 ..4..3..4..2..4..3..4..3..0....1..2..1..2..1..2..1..2..1
%e A183718 ..1..2..0..1..0..2..0..2..1....0..3..4..3..0..3..0..3..4
%e A183718 ...
%e A183718 ...R..L..R..L..R..L..R..L.......L..R..L..R..L..R..L..R...
%e A183718 ...L..R..L..R..L..R..L..R.......R..L..R..L..R..L..R..L...
%K A183718 nonn
%O A183718 1,1
%A A183718 _R. H. Hardin_, Jan 06 2011