Total number of divisors d of m (counted with multiplicity), such that the prime signature of d is a partition of four and m runs through the set of least numbers whose prime signature is a partition of n.
A309919
Total number of divisors d of m (counted with multiplicity), such that the prime signature of d is a partition of four and m runs through the set of least numbers whose prime signature is a partition of n.
Terms
- a(0) =5a(1) =20a(2) =65a(3) =160a(4) =371a(5) =756a(6) =1485a(7) =2701a(8) =4822a(9) =8144a(10) =13558a(11) =21756a(12) =34449a(13) =53044a(14) =80874a(15) =120573a(16) =178215a(17) =258897a(18) =373069a(19) =530068a(20) =748026a(21) =1043001a(22) =1445321a(23) =1983124a(24) =2705411a(25) =3659491a(26) =4924840a(27) =6578409a(28) =8746089a(29) =11553224
External references
- oeis: A309919