a(n) = (3*C(4p,p) - 20*C(3p,p) + 54*C(2p,p) - 60) / p^7, where p = prime(n).
A268590
a(n) = (3*C(4p,p) - 20*C(3p,p) + 54*C(2p,p) - 60) / p^7, where p = prime(n).
Terms
- a(0) =984a(1) =27780a(2) =32144568a(3) =1269360060
External references
- oeis: A268590