A264681 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,-1 1,0 -1,-2 -2,-2 or 0,1.

0, 108, 2417, 43131, 1449467, 43095017, 1095840260, 28215481268, 738782370243, 19083862672909, 487695637623505, 12462928299470408, 318459601523206145, 8122732708229887832, 206973840286092630463, 5272926892002041935804

Offset: 1

Author

R. H. Hardin, Nov 20 2015

Keywords

• nonn

Comments

Row 6 of A264676.

Examples

			Some solutions for n=4
..6..0..1..9..3....6.13..1..2..3....6..8..1..9..3....6..7..8..9..3
.11.18..2..7..4....0.18.19..7..4....0..5..2.14..4....0..1..2.14..4
..5.10.19..8.13....5.10.11..8..9...22.17..7.12.13....5.10.24.12.13
.22.15.12.17.14...22.15.12.17.14...10.11.23.24.18...22.11.23.17.18
.26.16.28.29.23...27.16.28.29.23...15.16.34.29.19...15.16.34.29.19
.20.21.34.27.24...20.21.26.34.24...20.21.26.27.28...20.21.26.27.28
.25.30.31.32.33...25.30.31.32.33...25.30.31.32.33...25.30.31.32.33
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..63

Crossrefs

Cf. A264676.