A264159 Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 0,-1 0,2 1,0 -1,0 or 2,0.

10, 72, 412, 2927, 19204, 126688, 845296, 5596616, 37146638, 246557278, 1635702595, 10854696412, 72027127388, 477937014228, 3171424959593, 21044247526367, 139641162227280, 926603205742348, 6148564722522943

Offset

1,1

Comments

Column 2 of A264163.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 84

Formula

Empirical recurrence of order 84 (see link above).

Example

Some solutions for n=4
..1..2..5....1..2..5....3..0..5....3..2..0....3..2..1....3..4..1....1..2..5
..6..7..8....0..7..3....6..1..2....6..1..4....0..5..8....0..5..8....0..7..8
..0..4.11....9..8.11....9..8..7....7.10..5....7..4..6....9..6..2....9..4.11
..3..9.14....6..4.10...10..4.14...12.11..8...12.11.10...10.11.14....3.13.14
.13.10.12...13.14.12...13.12.11....9.14.13....9.14.13...13..7.12....6.10.12

Crossrefs

Cf. A264163.

Sequence in context: A166791 A271035 A108276 * A228316 A228310 A164546

Adjacent sequences: A264156 A264157 A264158 * A264160 A264161 A264162

Keyword

nonn

Author

R. H. Hardin, Nov 06 2015

Status

approved