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A264068 Number of (n+1) X (5+1) arrays of permutations of 0..n*6+5 with each element having index change +-(.,.) 0,0 0,1 or 1,2. 1
89, 3025, 131890, 5645376, 242621698, 10427064769, 448121165789, 19258783041289, 827679549612058, 35570961850254336, 1528723680011326810, 65699547278636775625, 2823551809301370027485, 121347028252680274383361 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 43*a(n-1) - 43*a(n-3) + a(n-4) for n>5.
Empirical g.f.: x*(89 - 802*x + 1815*x^2 - 22067*x^3 + 516*x^4) / ((1 - x)*(1 + x)*(1 - 43*x + x^2)). - Colin Barker, Jan 04 2019
EXAMPLE
Some solutions for n=3:
..0..8.10..3.11..5....8..1..2.10..4..5....0..8..2..3.11..5....7..1.10..3.11..5
.13.15..1..2.17..4....6.15..0.16..3.11...14..7..1..9.10..4....6..0.15..2.17..4
.12..6.22..7.16..9...19.13.21..7..9.17...20.21..6.15.23.17...19.13.22..8.16..9
.18.19.20.21.14.23...18.12.20.14.22.23...18.19.12.13.22.16...18.12.20.21.14.23
CROSSREFS
Column 5 of A264071.
Sequence in context: A197362 A232321 A264161 * A189020 A322503 A157757
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 02 2015
STATUS
approved

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Last modified April 14 20:39 EDT 2024. Contains 371667 sequences. (Running on oeis4.)