|
|
A264073
|
|
Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 0,1 or 1,2.
|
|
1
|
|
|
16, 377, 12100, 239580, 5645376, 130697424, 3057071776, 70815364224, 1640245587376, 37991496430624, 879962725844576, 20381782810954224, 472084850498355776, 10934475563176382624, 253265394378463623376
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 24*a(n-1) -19*a(n-2) -11*a(n-3) +36*a(n-4) +3*a(n-5) for n>9
|
|
EXAMPLE
|
Some solutions for n=3
..5..1..7..3....0..1..7..3....0..6..2..3....5..6..7..3....0..1..7..3
..4..0..6..2...10..5.11..2....4.11..1..7....4..0..1..2....4.10..6..2
.13..9.15.11....8.15..4..6...14..9.15..5....8..9.10.11...14..9..5.11
.17..8.14.10...17.18.14..9...17.18..8.10...18.13.14.15...18..8.19.15
.16.12.18.19...16.12.13.19...16.12.13.19...16.17.12.19...16.17.12.13
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|