A264075 Number of (6+1) X (n+1) arrays of permutations of 0..n*7+6 with each element having index change +-(.,.) 0,0 1,1 or 1,2.

64, 6765, 1210000, 94000060, 10427064769, 1084282319384, 118020590202856, 12417526726851620, 1326024276162241425, 141133437011428928000, 15037363809591528083800, 1601021055218612828398400, 170459414939407294713069200, 18148606785812097702853499600

Offset: 1

Author

R. H. Hardin, Nov 02 2015

Keywords

• nonn

Examples

			Some solutions for n=2:
..0..5..2....0..5..2....0..1..2....0..5..2....4..5..2....0..5..2....0..1..2
..8..4..1....8..4..1....3..8..5....3..8..1....8..0..1....7..8..1....8..4..5
..6.11..3...10.11..3...11..7..4...10..7..4....6.11..3...11..3..4...11..7..3
..9.10..7...14..6..7...13.14..6....9..6.11...14.10..7....9.14..6...13.14..6
.17.13.14...12.13..9...12..9.10...12.17.14...12.17..9...17.13.10...12..9.10
.15.16.12...20.16.17...19.20.17...19.20.13...19.16.13...19.20.12...20.16.17
.18.19.20...18.19.15...18.15.16...18.15.16...18.15.20...18.15.16...18.19.15
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..152

Crossrefs

Row 6 of A264071.

Formula

Empirical: a(n) = 119*a(n-1) -1238*a(n-2) -11504*a(n-3) +132848*a(n-4) +180912*a(n-5) -203520*a(n-6) +1542400*a(n-7) +2403200*a(n-8) -768000*a(n-9) +640000*a(n-10) for n > 19.