Except a(0)=1 and a(4)=0, number of integer partitions of n with no 1's and at least two parts.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =3a(7) =3a(8) =6a(9) =7a(10) =11a(11) =13a(12) =20a(13) =23a(14) =33a(15) =40a(16) =54a(17) =65a(18) =87a(19) =104a(20) =136a(21) =164a(22) =209a(23) =252a(24) =319a(25) =382a(26) =477a(27) =573a(28) =707a(29) =846