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A263812 Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 with each element having index change (+-,+-) 0,0 0,1 0,2 or 1,0 1
82, 948, 11305, 134028, 1590733, 18875976, 223995034, 2658056430, 31542099589, 374297467464, 4441638405853, 52707146757882, 625454634139210, 7422020035297392, 88074143832191077, 1045140645645600804 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A263816

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +23*a(n-2) -10*a(n-3) -a(n-4)

EXAMPLE

Some solutions for n=4

..2..0..1....2..0..1....0..2..1....2..1..0....1..0..2....0..4..1....2..0..1

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

..7..6.11....7..8..5....8..4..6....9..4..7....3..8..6....7..8.11....9..6..8

.10.13..8...10.11..9...12..9.14....6.11.10...12.13.14....6..9.10...10..7.11

..9.12.14...12.13.14...13.10.11...13.12.14....9.10.11...12.14.13...14.13.12

CROSSREFS

Cf. A263816

Sequence in context: A173356 A083386 A282159 * A160154 A093282 A085439

Adjacent sequences:  A263809 A263810 A263811 * A263813 A263814 A263815

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 27 2015

STATUS

approved

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Last modified December 11 19:09 EST 2017. Contains 295919 sequences.