A264419 Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

0, 37, 499, 7311, 137584, 2486429, 40217261, 681146169, 11846231201, 202674077729, 3440768212887, 58817070295375, 1006675030473401, 17189924020400699, 293506491114760927, 5015242699900223807

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Column 4 of A264422.

Examples

			Some solutions for n=4
.11..0..8..2..3....6..7..8..2..3....6..7..8..9..3...11..0..1..2..3
.16..1.10..7..4....0.12.13.14..4....0..1..2.11..4...16.12.13.14..4
..5..6.23.24..9....5.17.23..1..9...16.17.23.12.13...21..6.23..8..9
.21.22.12.13.14...21.11.20.24.18...21.22..5.24.14...10.22..5.24..7
.15.20.17.18.19...15.16.10.22.19...15.20.10.18.19...15.20.17.18.19
		

Links

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

Crossrefs

Cf. A264422.