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

Terms

a(0) =1a(1) =0a(2) =5a(3) =5a(4) =21a(5) =40a(6) =100a(7) =210a(8) =396a(9) =870a(10) =1790a(11) =3510a(12) =6681a(13) =13100a(14) =25320a(15) =47835a(16) =87126a(17) =166195a(18) =299375a(19) =542595a(20) =991036a(21) =1775935a(22) =3145270a(23) =5487805a(24) =9852046a(25) =17092310a(26) =29561070a(27) =50696690a(28) =88015196a(29) =150446590