a(n) = Sum of (Y(2,p)^2) over the partitions p of n, Y(2,p) = number of part sizes with multiplicity 2 or greater in p.

A302347

a(n) = Sum of (Y(2,p)^2) over the partitions p of n, Y(2,p) = number of part sizes with multiplicity 2 or greater in p.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =1a(4) =3a(5) =4a(6) =10a(7) =13a(8) =25a(9) =34a(10) =59a(11) =80a(12) =127a(13) =172a(14) =260a(15) =349a(16) =505a(17) =673a(18) =946a(19) =1248a(20) =1711a(21) =2238a(22) =3010a(23) =3902a(24) =5162a(25) =6637a(26) =8663a(27) =11051a(28) =14253a(29) =18051

External references