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A190921
Number of permutations of n copies of 1..5 introduced in order 1..5 with no element equal to another within a distance of 2
1
1, 99, 12721, 1903102, 312841383, 54811120355, 10054355708671, 1909325866644096, 372521441486934113, 74275858248868186497, 15075586701977689855707, 3105668779830679872107622
OFFSET
1,2
LINKS
EXAMPLE
Some solutions for n=2
..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1
..2....2....2....2....2....2....2....2....2....2....2....2....2....2....2....2
..3....3....3....3....3....3....3....3....3....3....3....3....3....3....3....3
..4....4....4....4....4....4....4....4....4....4....4....1....4....4....4....1
..5....2....2....5....5....5....5....1....5....5....1....4....1....1....2....4
..1....3....5....3....2....2....3....5....3....2....3....5....5....5....5....5
..4....5....3....4....4....1....4....3....2....3....5....3....2....3....3....2
..2....4....4....2....3....5....5....4....4....4....2....4....4....4....1....4
..3....1....5....5....5....4....2....2....5....1....4....2....5....5....5....3
..5....5....1....1....1....3....1....5....1....5....5....5....3....2....4....5
CROSSREFS
Sequence in context: A195623 A274743 A244842 * A213694 A295434 A233227
KEYWORD
nonn
AUTHOR
R. H. Hardin May 23 2011
STATUS
approved