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A264133 Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 1,2. 1

%I

%S 1,13,169,1040,6400,53280,443556,3383280,25806400,203738480,

%T 1608491236,12558632416,98054154496,768752950768,6027088830169,

%U 47188038099235,369450492999025,2893968831142495,22668952280018641,177540636808778880

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

%C Row 2 of A264131.

%H R. H. Hardin, <a href="/A264133/b264133.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..0..3..4..1..2....0..1..9..3..4....0..1..4..3..2....2..1..0..3..4

%e ..5..8.14..6..9....7..6..5..8..2....5..8..7..6..9....7..6.14..8..9

%e .12.13.10.11..7...10.13.12.11.14...10.11.14.13.12...10.11..5.13.12

%Y Cf. A264131.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 03 2015

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Last modified August 3 08:10 EDT 2020. Contains 336197 sequences. (Running on oeis4.)