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A264568 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change 1,0 1,1 0,-1 or -1,1. 1
4, 160, 2172, 47571, 868613, 16284544, 298587595, 5442431797, 99386232806, 1803702025944, 32778396578439, 594763583660497, 10789731888817704, 195712516698029249, 3549147337219998085, 64361582471647592799 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A264569.

LINKS

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

EXAMPLE

Some solutions for n=4

..1..8..3.10.11..6..7.14....1..2..9..4..5.12..7.14....1..8..3..4.11..6.13.14

..9..0..2.12..4..5.15.22....0.16.17..3.13.20.15..6....9..0..2.18.19.20..5..7

.17.18.19.26.21.13.23.30....8.24.10.26.11.22.29.30...17.24.25.10.12.22.23.15

.16.32.33.34.29.20.37.38...25.32.18.28.19.36.21.23...16.32.27.28.35.21.31.38

.24.25.35.36.27.28.39.31...33.34.35.27.37.38.39.31...33.34.26.36.37.29.39.30

CROSSREFS

Cf. A264569.

Sequence in context: A205305 A268047 A278770 * A224044 A224275 A224198

Adjacent sequences:  A264565 A264566 A264567 * A264569 A264570 A264571

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2015

STATUS

approved

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Last modified May 26 17:33 EDT 2019. Contains 323597 sequences. (Running on oeis4.)