Number of compositions of n in which the minimal multiplicity of parts equals 4.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =0a(8) =71a(9) =126a(10) =336a(11) =330a(12) =776a(13) =841a(14) =1541a(15) =1821a(16) =2951a(17) =3221a(18) =5322a(19) =5697a(20) =43288a(21) =99626a(22) =313917a(23) =807218a(24) =2049995a(25) =4769054a(26) =10240287a(27) =22002219a(28) =45015647a(29) =90239153