A264626 Number of (n+1) X (6+1) arrays of permutations of 0..n*7+6 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.

0, 37, 393, 2736, 37225, 604916, 7201068, 81028312, 992539392, 12531858912, 152233949504, 1825908062080, 22176607035392, 270645955787776, 3285536600205312, 39798931437072384, 482959453126127616

Offset: 1

Author

R. H. Hardin, Nov 19 2015

Keywords

• nonn

Comments

Column 6 of A264628.

Examples

			Some solutions for n=4
..1..2..3..4..5..6.20....7..2.16.10..5..6.13....1.15..9..4.11..6.13
..8..0.16.11.12.13.27....8..0..1.11..3..4.27....8..0.16..2..3.19..5
.15..7.23..9.10.33.34...15.22.30..9.32.20.12...21..7.17.18.10.20.12
.28.14.30.31.17.18.19...28.14.24.25.17.18.19...28.14.24.31.32.27.34
.29.21.22.32.24.25.26...29.21.31.23.33.34.26...29.30.22.23.33.25.26
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..184

Crossrefs

Cf. A264628.