A226876 Number of n-length words w over a 6-ary alphabet {a1,a2,...,a6} such that #(w,a1) >= #(w,a2) >= ... >= #(w,a6) >= 0, where #(w,x) counts the letters x in word w.

1, 1, 3, 10, 47, 246, 1602, 6441, 35023, 175510, 1017158, 5412111, 33991322, 168112907, 982269641, 5378704155, 31714236863, 174819971462, 1082436507990, 5756932808211, 34302363988462, 193719726696345, 1150224854410151, 6482217725030141, 39812123155826626

Offset

0,3

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Maple

b:= proc(n, i, t) option remember;
      `if`(t=1, 1/n!, add(b(n-j, j, t-1)/j!, j=i..n/t))
    end:
a:= n-> n!*b(n, 0, 6):
seq(a(n), n=0..30);

Crossrefs

Column k=6 of A226873.

Sequence in context: A218919 A346188 A226875 * A325308 A226877 A226878

Adjacent sequences: A226873 A226874 A226875 * A226877 A226878 A226879

Keyword

nonn

Author

Alois P. Heinz, Jun 21 2013

Status

approved