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A293798 Number of multisets of nonempty words with a total of n letters over ternary alphabet containing the third 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, 4, 17, 58, 193, 603, 1852, 5539, 16391, 47919, 139258, 402365, 1159175, 3330974, 9561080, 27421882, 78642072, 225566206, 647308614, 1858741431, 5341591906, 15363474607, 44228744168, 127444421304, 367573522408, 1061131077602, 3066124030310, 8867379519154 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 3..1000

FORMULA

a(n) = A293733(n) - A293732(n).

CROSSREFS

Column k=3 of A293109.

Cf. A293732, A293733.

Sequence in context: A317757 A183924 A255271 * A027075 A202974 A034331

Adjacent sequences:  A293795 A293796 A293797 * A293799 A293800 A293801

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Oct 16 2017

STATUS

approved

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Last modified June 19 00:55 EDT 2019. Contains 324217 sequences. (Running on oeis4.)