A264367 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,0 0,2 1,0 or -1,-2.

1, 13, 169, 936, 5184, 33408, 215296, 1323792, 8139609, 50261301, 310358689, 1916465345, 11834176225, 73043905820, 450847788304, 2783165854192, 17180991840016, 106056375378580, 654674355426025, 4041262228505645

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Row 3 of A264364.

Examples

			Some solutions for n=4
..7..1..0..3..4....7..1..0..3..4....0..8..9..3..2....7..1..0..3..4
..5..6..2..8..9....5..6..2..8..9....5..1.14..6..4...12..6..2..8..9
.10.18.19.13.12...10.18.12.13.14...10.18..7.13.12....5.18.19.11.14
.15.11.17.16.14...15.11.17.16.19...15.11.17.16.19...10.16.15.13.17
		

Links

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

Crossrefs

Cf. A264364.