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A263851 Number of 4-ascent sequences of length n that avoid the pattern 00. 2
1, 1, 4, 16, 58, 190, 564, 1526, 3794, 8747, 18869, 38402, 74273, 137372, 244271, 419488, 698415, 1131045, 1786650, 2759580, 4176372, 6204378, 9062142, 13031778, 18473624, 25843471, 35712691, 48791614, 65956531, 88280728, 117069985, 153903004, 200677261 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Sergey Kitaev, J. B. Remmel, A note on p-Ascent Sequences, Preprint, 2016

S. Kitaev, J. Remmel, p-Ascent Sequences, arXiv preprint arXiv:1503.00914 [math.CO], 2015.

FORMULA

G.f.: -(4*x^9 -27*x^8 +82*x^7 -152*x^6 +192*x^5 -168*x^4 +99*x^3 -39*x^2 +9*x-1) / (x-1)^10. - Alois P. Heinz, Nov 19 2015

CROSSREFS

Cf. A261383.

Sequence in context: A283124 A282393 A034514 * A126644 A168583 A092688

Adjacent sequences:  A263848 A263849 A263850 * A263852 A263853 A263854

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Nov 18 2015

EXTENSIONS

a(9)-a(32) from Alois P. Heinz, Nov 19 2015

STATUS

approved

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Last modified July 16 04:26 EDT 2019. Contains 325064 sequences. (Running on oeis4.)