Number of proper factorizations of p1^n*p2^2, where p1 and p2 are distinct primes.

Terms

a(0) =1a(1) =3a(2) =8a(3) =15a(4) =28a(5) =46a(6) =76a(7) =117a(8) =180a(9) =266a(10) =391a(11) =559a(12) =796a(13) =1110a(14) =1540a(15) =2105a(16) =2862a(17) =3845a(18) =5141a(19) =6807a(20) =8972a(21) =11732a(22) =15274a(23) =19752a(24) =25442a(25) =32581a(26) =41568a(27) =52769a(28) =66756a(29) =84077