A293802 Number of multisets of nonempty words with a total of n letters over septenary alphabet containing the seventh letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.

1, 8, 65, 402, 2457, 13715, 75997, 405672, 2160487, 11323773, 59410323, 309820614, 1620398321, 8465984310, 44406170067, 233282360743, 1230967142377, 6514406116198, 34634583683433, 184803113451639, 990647642903411, 5331286355111395, 28821503947539335

Offset

7,2

Links

Alois P. Heinz, Table of n, a(n) for n = 7..1000

Formula

a(n) = A293737(n) - A293736(n).

Crossrefs

Column k=7 of A293109.

Cf. A293736, A293737.

Sequence in context: A009373 A305589 A317007 * A316872 A317600 A288788

Adjacent sequences: A293799 A293800 A293801 * A293803 A293804 A293805

Keyword

nonn

Author

Alois P. Heinz, Oct 16 2017

Status

approved