Sum of multinomials M(n-k; p_1-1, ..., p_k-1), where p = (p_1, ..., p_k) ranges over all compositions of n into distinct parts (k is a composition length).
A327712
Sum of multinomials M(n-k; p_1-1, ..., p_k-1), where p = (p_1, ..., p_k) ranges over all compositions of n into distinct parts (k is a composition length).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =9a(6) =29a(7) =57a(8) =135a(9) =615a(10) =2635a(11) =6273a(12) =25151a(13) =82623a(14) =525281a(15) =2941047a(16) =9100709a(17) =38766777a(18) =205155713a(19) =902705793a(20) =7714938567a(21) =52987356783a(22) =204844103977
External references
- oeis: A327712