Dirichlet g.f.: zeta(s)^2 * zeta(s-2)^2.

Terms

a(0) =1a(1) =10a(2) =20a(3) =67a(4) =52a(5) =200a(6) =100a(7) =380a(8) =282a(9) =520a(10) =244a(11) =1340a(12) =340a(13) =1000a(14) =1040a(15) =1973a(16) =580a(17) =2820a(18) =724a(19) =3484a(20) =2000a(21) =2440a(22) =1060a(23) =7600a(24) =1978a(25) =3400a(26) =3460a(27) =6700a(28) =1684a(29) =10400