Number of proper factorizations of p1^n*p2^4, where p1 and p2 are distinct primes.

Terms

a(0) =4a(1) =11a(2) =28a(3) =56a(4) =108a(5) =188a(6) =322a(7) =521a(8) =830a(9) =1278a(10) =1940a(11) =2875a(12) =4214a(13) =6065a(14) =8643a(15) =12150a(16) =16932a(17) =23335a(18) =31920a(19) =43263a(20) =58249a(21) =77824a(22) =103361a(23) =136370a(24) =178974a(25) =233531a(26) =303267a(27) =391830a(28) =504068a(29) =645519