cp's OEIS Frontend

A264486 Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.

%I A264486 #6 Nov 14 2015 16:52:55
%S A264486 1,10,36,212,2144,9714,92052,581575,4510937,31398740,236553733,
%T A264486 1681262954,12489549989,90270132471,663622115288,4832089305548,
%U A264486 35389917941640,258336002558736,1889497035402309,13806771114617572
%N A264486 Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.
%C A264486 Column 3 of A264490.
%H A264486 R. H. Hardin, <a href="/A264486/b264486.txt">Table of n, a(n) for n = 1..210</a>
%e A264486 Some solutions for n=4
%e A264486 ..4..5..6..7....4..5..6..7....4..5..3..7....4..5..6..7....4..5..3..7
%e A264486 ..8..1..2..3....0..1..2.11....0..9..2.11....0..1.10..3....0..1.10.11
%e A264486 .12..0.14.15....9.13..3.15...12.13..1.15...12.13.14..2...12.13.14..2
%e A264486 .16.17.18.11...16.17.18.19...16..6.18.19...16..9.18.19...16.17.18..6
%e A264486 ..9.13.19.10...12..8.14.10...17..8.14.10...17..8.11.15....9..8.19.15
%Y A264486 Cf. A264490.
%K A264486 nonn
%O A264486 1,2
%A A264486 _R. H. Hardin_, Nov 14 2015