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A264381 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1. 1
1, 13, 80, 385, 2345, 14329, 88264, 538417, 3284212, 20034334, 122324128, 746763789, 4557854384, 27820780958, 169811407936, 1036520322168, 6326740063001, 38617694163183, 235716525841304, 1438783215929873 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A264379.

LINKS

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

R. H. Hardin, Empirical recurrence of order 70

FORMULA

Empirical recurrence of order 70 (see link above)

EXAMPLE

Some solutions for n=4

..1..6..5..8..7....1..2..5..4..9....5..2..7..4..9....5..2..3..8..7

..0.11..2.13.12....0..7..8..3.12....0..1..8..3.12....0..1.12..9..4

.15..3..4.16..9...15..6.17.16.19...15..6.13.16.17...15..6.13.16.17

.10.17.18.19.14...10.11.18.13.14...10.11.18.19.14...10.11.18.19.14

CROSSREFS

Cf. A264379.

Sequence in context: A136373 A071614 A045552 * A297678 A189451 A133718

Adjacent sequences:  A264378 A264379 A264380 * A264382 A264383 A264384

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 12 2015

STATUS

approved

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Last modified July 15 20:24 EDT 2019. Contains 325056 sequences. (Running on oeis4.)