The number of partitions of n in which at least one part is a multiple of 3.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =2a(6) =4a(7) =6a(8) =9a(9) =14a(10) =20a(11) =29a(12) =41a(13) =57a(14) =78a(15) =106a(16) =142a(17) =189a(18) =250a(19) =327a(20) =425a(21) =549a(22) =705a(23) =900a(24) =1144a(25) =1445a(26) =1819a(27) =2279a(28) =2844a(29) =3534