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%I #6 Nov 10 2015 12:01:30
%S 25,180,1920,23805,254393,2896729,32417000,362988208,4079574153,
%T 45742016837,513349384857,5760401480068,64634042719216,
%U 725279709931309,8138297524707793,91320059100929713,1024705806548622112
%N Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 0,-1 0,2 1,0 or -1,0.
%C Row 3 of A264257.
%H R. H. Hardin, <a href="/A264259/b264259.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..5..6..7..4..9....5..6..1..4..9....1..6..3..4..9....5..0..1..4..3
%e ..0..1..2..3..8....0..7..2..3.14....0..7..2.13..8...10..7..2.13..8
%e .15.12.11.18.19...11.12.10..8.19....5.16.11.14.19...15..6.17.14..9
%e .10.17.16.13.14...16.17.15.13.18...10.15.12.17.18...16.11.12.19.18
%Y Cf. A264257.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 09 2015
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