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A264487 Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0. 1
1, 8, 108, 788, 21466, 142352, 2870927, 30309632, 463508815, 5517128232, 80746395988, 996650042932, 14098841570856, 180039273539208, 2481030453759277, 32286677930222166, 438951446059251344 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A264490.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..138

EXAMPLE

Some solutions for n=4

.12..6..7..4..9....5..6..7..4..9....5..6..7..8..9....5..6..7..8..9

..0..1..2..3.14....0.18.12.13.14...10..1.12.13..4...10.11..2..3..4

..5.16.17.18.19...15.16..1..2..3...11..0.24..2..3...22..0..1.18.19

.20.21.22.23..8...20.11.22.23..8...20.21.22.23.14...20.21.12.23.14

.15.10.11.24.13...21.10.17.24.19...15.16.17.18.19...15.16.17.24.13

CROSSREFS

Cf. A264490.

Sequence in context: A119936 A276296 A164749 * A048543 A300468 A326101

Adjacent sequences:  A264484 A264485 A264486 * A264488 A264489 A264490

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 14 2015

STATUS

approved

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Last modified August 15 13:04 EDT 2022. Contains 356145 sequences. (Running on oeis4.)