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A264247 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,0 1,1 0,-1 -1,1 or 0,-2. 1
5, 89, 804, 9005, 108020, 1249237, 14586353, 170942377, 2001234341, 23442021869, 274620887525, 3216999655749, 37686430970013, 441491908931301, 5172017040629972, 60589567209926973, 709799837866982993 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A264244.

LINKS

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

EXAMPLE

Some solutions for n=4

..1..2..6..7..4....0..1..2..3..4....0..5..6..3..4....0..5..2..3..4

..5..0.11..9..3....5.10..8.12..9....7..8..1..2..9....6.10..1..9.13

.10.12.13.14..8...11.15..6..7.14...10.12.16.14.18...12.15.14..7..8

.15.16.17.18.19...16.17.18.19.13...15.17.11.19.13...16.17.11.18.19

CROSSREFS

Cf. A264244.

Sequence in context: A277233 A167735 A221517 * A348578 A067257 A134497

Adjacent sequences:  A264244 A264245 A264246 * A264248 A264249 A264250

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 09 2015

STATUS

approved

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Last modified June 29 05:44 EDT 2022. Contains 354910 sequences. (Running on oeis4.)