A264382 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.

0, 25, 441, 3778, 60858, 711068, 9407584, 115929779, 1485398475, 18746069596, 237937556367, 3012183685044, 38165904080061, 483579364451792, 6125734123144467, 77617437527388938, 983250878745280550

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Row 4 of A264379.

Examples

			Some solutions for n=4
..1..6..5..8..9....1..2..7..6..9....5..6..7..8..9....1..6..3..4..7
..0.11.12.13..4....0.11.10..3..4....0..1.10..3..4....0.11..2.13.14
..2..3..7.18.17....5.16.15..8.17....2.12.15.18.17....5.12.15.18..9
.10.21.20.23.22...20.21.18.13.14...16.11.20.13.14...10..8.20.23.22
.15.16.14.24.19...12.22.23.24.19...21.22.23.24.19...21.16.17.24.19
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 81

Crossrefs

Cf. A264379.

Formula

Empirical recurrence of order 81 (see link above)