Number T(n,k) of multisets of nonempty words with a total of n letters over k-ary alphabet such that for k>0 the k-th letter occurs at least once and within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

A319495

Number T(n,k) of multisets of nonempty words with a total of n letters over k-ary alphabet such that for k>0 the k-th letter occurs at least once and within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =2a(6) =0a(7) =3a(8) =5a(9) =6a(10) =0a(11) =5a(12) =20a(13) =18a(14) =24a(15) =0a(16) =7a(17) =46a(18) =86a(19) =84a(20) =120a(21) =0a(22) =11a(23) =137a(24) =347a(25) =456a(26) =480a(27) =720a(28) =0a(29) =15

External references