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A293886 Number of sets of nonempty words with a total of n letters over quinary alphabet containing the fifth 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, 6, 36, 172, 813, 3576, 15647, 66493, 282063, 1181554, 4951592, 20648077, 86254964, 359920291, 1505749933, 6305449303, 26485669295, 111485395542, 470834817242, 1993891398761, 8472782274541, 36113575773694, 154458283438023, 662716935400473, 2853093892389838 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 5..1000

FORMULA

a(n) = A293744(n) - A293743(n).

CROSSREFS

Column k=5 of A293113.

Cf. A293743, A293744.

Sequence in context: A190065 A293068 A213294 * A132165 A200573 A224130

Adjacent sequences:  A293883 A293884 A293885 * A293887 A293888 A293889

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Oct 18 2017

STATUS

approved

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Last modified May 25 06:43 EDT 2022. Contains 354049 sequences. (Running on oeis4.)