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A293797 Number of multisets of nonempty words with a total of n letters over binary alphabet containing the second letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter. 2
1, 3, 10, 24, 62, 140, 329, 725, 1631, 3548, 7820, 16887, 36767, 79046, 170799, 365883, 786361, 1679486, 3594580, 7656839, 16331933, 34705064, 73810524, 156501393, 332001987, 702530049, 1486995062, 3140712201, 6634309660, 13988510961, 29494808402, 62091823865 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 2..1000

FORMULA

a(n) = A293732(n) - A000041(n).

CROSSREFS

Column k=2 of A293109.

Cf. A000041, A293732.

Sequence in context: A062446 A053208 A286209 * A179608 A192912 A168062

Adjacent sequences:  A293794 A293795 A293796 * A293798 A293799 A293800

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Oct 16 2017

STATUS

approved

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Last modified May 24 11:19 EDT 2019. Contains 323529 sequences. (Running on oeis4.)