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A190936 Number of permutations of n copies of 1..8 introduced in order 1..8 with no element equal to another within a distance of 5 1
1, 2628, 8341096, 29584295480, 113973074548248, 468377213896673183, 2027292282593307983972, 9154283191553066456530508, 42808534280820262732168056032, 206132516276458610178941094332608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..11

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....4....4....4....4....4

..5....5....5....5....5....5....5....5....5....5....5....5....5....5....5....5

..6....6....6....6....6....6....6....6....6....6....6....6....6....6....6....6

..7....1....7....7....7....7....7....7....7....7....7....7....7....7....7....7

..8....7....2....2....8....1....2....1....8....8....2....8....8....8....8....2

..1....8....8....8....1....8....8....8....1....2....8....3....2....3....2....8

..2....2....3....4....4....2....3....4....3....3....1....2....1....4....3....3

..3....3....4....1....5....4....1....5....4....4....5....5....3....2....5....5

..4....5....6....3....6....5....6....2....2....6....6....4....4....5....6....1

..7....6....5....5....3....6....7....3....5....1....7....6....6....6....4....7

..6....7....1....7....2....7....5....6....8....8....3....1....8....8....8....4

..5....4....7....6....8....3....4....7....7....5....4....7....5....1....1....6

..8....8....8....8....7....8....8....8....6....7....8....8....7....7....7....8

CROSSREFS

Sequence in context: A236621 A221941 A234698 * A020439 A254776 A254769

Adjacent sequences:  A190933 A190934 A190935 * A190937 A190938 A190939

KEYWORD

nonn

AUTHOR

R. H. Hardin May 23 2011

STATUS

approved

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Last modified January 28 18:02 EST 2022. Contains 350657 sequences. (Running on oeis4.)