A264653 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 1,1 2,2 -1,0 or 0,-1.

0, 41, 193, 3100, 48781, 580796, 7644038, 93971260, 1163775908, 14482108589, 177568766733, 2190703603084, 26984752545932, 331832433327581, 4085840672826651, 50271604425392099, 618555768777598955

Offset

1,2

Comments

Column 6 of A264655.

Links

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

Example

Some solutions for n=4
..7..2..9.10..5..6.13....1..8..3.10.11..6.13....1..8..3..4.11..6.13
..8.15.16.17.12..4.20...14..0.16..2.12..4..5...14..9.10.17.12.19..5
.21.22..0..1.19..3.27...21..7.17..9.19.20.27...21..7..0.24..2.20.27
.28.14.24.25.32.18.11...28.23.15.31.26.33.34...28.23.15.31.26.33.34
.29.30.31.23.33.34.26...29.30.22.32.24.25.18...29.30.22.32.16.25.18

Crossrefs

Cf. A264655.

Sequence in context: A142080 A254228 A141939 * A297227 A089634 A142526

Adjacent sequences: A264650 A264651 A264652 * A264654 A264655 A264656

Keyword

nonn

Author

R. H. Hardin, Nov 20 2015

Status

approved