a(n) = A108951(n) * A276086(A108951(n)).

Terms

a(0) =2a(1) =6a(2) =30a(3) =36a(4) =210a(5) =300a(6) =2310a(7) =120a(8) =1260a(9) =2940a(10) =30030a(11) =15000a(12) =510510a(13) =50820a(14) =21176820a(15) =3600a(16) =9699690a(17) =88200a(18) =223092870a(19) =288120a(20) =2232166860a(21) =780780a(22) =6469693230a(23) =42000a(24) =645668100a(25) =17357340a(26) =11880a(27) =12298440a(28) =200560490130a(29) =66555720