A264143 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change +-(.,.) 0,0 1,-2 or 1,1.

8, 125, 1440, 15488, 168948, 1903336, 20768650, 228712964, 2514024565, 27630491593, 304037924437, 3343529124864, 36775469678400, 404510148892477, 4449339039778765, 48939316077898664, 538295657554650689

Offset: 1

Author

R. H. Hardin, Nov 04 2015

Keywords

• nonn

Comments

Row 3 of A264142.

Examples

			Some solutions for n=4
..0..1..5..3..4....0..1..2..3..4....0..1..2..6..4....0..1..5..6..7
..2..6..7.14..9...11..6.10.14..9....5..3.10.14.12....2..3..4.14..9
.16..8.18.13.17....7..5.15.13..8...16..8..9..7.17...10..8.12.13.17
.15.10.11.12.19...12.16.17.18.19...15.13.11.18.19...15.16.11.18.19
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 67

Crossrefs

Cf. A264142.

Formula

Empirical recurrence of order 67 (see link above)