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A264575 Number of (7+1)X(n+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, 64, 646, 18540, 403872, 13182464, 298587595, 8004883334, 207395987160, 5415371441696, 139437679992950, 3610605830997732, 93761760429319800, 2424276830794155853, 62680901817510938800, 1621243139189452222421 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A264569.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..79

EXAMPLE

Some solutions for n=4

..1..2..6..4..8....1..2..3..4..8....1..2..6..4..8....1..5..6..4..8

..0..7.11.12..3....0.10.11..9.13....0..7.11..9..3....0.10..2..3.13

..5.15.13.14..9....5..6..7.14.18....5.15.16.14.18...11.15..7.14..9

.16.10.18.19.23...16.20.21.12.23...10.17.12.19.13...16.17.18.12.23

.21.25.17.24.28...15.22.17.24.19...21.22.23.27.28...21.25.26.24.19

.20.27.22.29.33...26.30.28.32.33...26.20.31.29.24...20.27.22.32.33

.31.35.26.37.38...25.35.27.37.29...25.35.36.34.38...31.35.36.28.29

.36.30.32.39.34...36.31.38.39.34...30.37.32.39.33...30.37.38.39.34

CROSSREFS

Cf. A264569.

Sequence in context: A128782 A318779 A264567 * A053957 A145244 A268165

Adjacent sequences:  A264572 A264573 A264574 * A264576 A264577 A264578

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2015

STATUS

approved

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Last modified February 22 23:44 EST 2020. Contains 332157 sequences. (Running on oeis4.)