The number of overpartitions of n whose Frobenius symbols have only positive parts in the top row.

Terms

a(0) =1a(1) =0a(2) =2a(3) =4a(4) =6a(5) =10a(6) =16a(7) =26a(8) =40a(9) =62a(10) =92a(11) =136a(12) =198a(13) =284a(14) =404a(15) =570a(16) =794a(17) =1100a(18) =1512a(19) =2060a(20) =2792a(21) =3760a(22) =5030a(23) =6696a(24) =8868a(25) =11682a(26) =15322a(27) =20008a(28) =26012a(29) =33688