A264418 - OEIS

A264418

Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

0, 12, 96, 529, 4843, 44264, 352713, 2840274, 23795758, 197390196, 1619132059, 13345740560, 110326933611, 910298134238, 7505842151352, 61932503872184, 511075503235669, 4216464623838747, 34786555887673881, 287016646384919794

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OFFSET

1,2

COMMENTS

Column 3 of A264422.

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

..9..6..1..5....5.10..1..2....5..6..7..2....9..6..7..5....9.10..4..2

.13.10..2..3....0..4.15..3...13..1.15..3....0..1..2..3....0..1..5..3

..4.14..0..7...13.14..6..7....4.14..0.10...13.14.19.10...13.14..6..7

.17.18.19.11....8.18.19.11...17..9.19.11...17.18..4.11....8.18.19.11

.12.16..8.15...12.16.17..9...12.16..8.18...12.16..8.15...12.16.17.15

CROSSREFS

Cf. A264422.

Sequence in context: A120658 A121627 A138162 * A073392 A038845 A204623

Adjacent sequences: A264415 A264416 A264417 * A264419 A264420 A264421

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 12 2015

STATUS

approved