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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
OFFSET
2,2
LINKS
FORMULA
a(n) = A293732(n) - A000041(n).
CROSSREFS
Column k=2 of A293109.
Sequence in context: A338710 A336516 A286209 * A179608 A340686 A192912
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Oct 16 2017
STATUS
approved