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A187775 Number of nonnegative integer arrays of length n summing to n without adjacent values differing by exactly 1 1
1, 3, 4, 13, 22, 84, 169, 585, 1368, 4352, 11018, 33610, 89097, 265059, 724070, 2122093, 5909279, 17178016, 48426584, 140179658, 398403254, 1150970558, 3289206057, 9495961430, 27241417922, 78650410773, 226250990962, 653512163209 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

All solutions for n=3

..0....3....1....0

..3....0....1....0

..0....0....1....3

CROSSREFS

Sequence in context: A293941 A182691 A026700 * A295955 A151521 A142860

Adjacent sequences:  A187772 A187773 A187774 * A187776 A187777 A187778

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 10 2013

STATUS

approved

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Last modified July 28 00:54 EDT 2021. Contains 346316 sequences. (Running on oeis4.)