a(n) = tau(n) * (NumberOfPartitions(n) - 1).

Terms

a(0) =0a(1) =0a(2) =2a(3) =4a(4) =12a(5) =12a(6) =40a(7) =28a(8) =84a(9) =87a(10) =164a(11) =110a(12) =456a(13) =200a(14) =536a(15) =700a(16) =1150a(17) =592a(18) =2304a(19) =978a(20) =3756a(21) =3164a(22) =4004a(23) =2508a(24) =12592a(25) =5871a(26) =9740a(27) =12036a(28) =22302a(29) =9128