Sum of multinomials of (-1 + number of runs) in the partitions of n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =12a(7) =17a(8) =28a(9) =42a(10) =68a(11) =104a(12) =171a(13) =268a(14) =442a(15) =715a(16) =1192a(17) =1970a(18) =3332a(19) =5611a(20) =9614a(21) =16472a(22) =28546a(23) =49583a(24) =86876a(25) =152656a(26) =269983a(27) =479077a(28) =854309a(29) =1528314