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A200152 Number of 0..6 arrays x(0..n-1) of n elements with zero n-1st difference 0
1, 7, 25, 107, 381, 1589, 5153, 18809, 68813, 256859, 883247, 4997167, 12448095, 76804553, 181129817, 522024177, 1884097881, 16163873397, 38888615377, 239811969005 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A200154

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Some solutions for n=6

..1....1....6....5....5....3....5....0....0....0....6....2....0....4....2....5

..6....4....6....4....1....4....6....0....6....2....6....6....2....4....2....2

..2....2....5....4....2....0....3....2....3....3....4....6....0....4....2....2

..0....2....3....4....3....1....2....2....2....3....2....6....2....3....4....1

..3....4....2....4....3....6....4....0....4....3....2....6....6....2....6....0

..6....1....6....5....5....3....5....0....0....5....6....2....0....4....2....5

CROSSREFS

Sequence in context: A289606 A102900 A155271 * A255280 A327627 A110240

Adjacent sequences: A200149 A200150 A200151 * A200153 A200154 A200155

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 13 2011

STATUS

approved

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Last modified December 7 19:19 EST 2022. Contains 358669 sequences. (Running on oeis4.)