A264876 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.

0, 20, 228, 2348, 22400, 207424, 1946752, 18265856, 171168256, 1602206720, 14987712512, 140201013248, 1311499247616, 12268128616448, 114758535184384, 1073466206519296, 10041325376634880, 93927687502692352, 878609985428783104

Offset

1,2

Comments

Column 6 of A264878.

Links

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

Example

Some solutions for n=4
.14..2..3..4.18..6.20...14..2..3..4..5..6.20...14..2..3..4..5..6.20
..8..0..1..9.25.13..5....8..0..1.11.10.13.12....8..0..1.11.25.13.12
.28..7.15.16.10.11.12...28..7.17..9.32.18.34...15..7.30..9.10.18.34
.22.21.24.23.17.27.19...22.23.15.16.26.27.19...22.21.24.16.17.27.19
.29.30.31.32.33.34.26...29.21.31.30.24.25.33...29.28.31.23.33.32.26

Crossrefs

Cf. A264878.

Sequence in context: A007160 A195265 A321674 * A341394 A023018 A073386

Adjacent sequences: A264873 A264874 A264875 * A264877 A264878 A264879

Keyword

nonn

Author

R. H. Hardin, Nov 27 2015

Status

approved