Number of proper factorizations of p1^n*p2^7, where p1 and p2 are distinct primes.

Terms

a(0) =14a(1) =44a(2) =117a(3) =256a(4) =521a(5) =974a(6) =1751a(7) =2997a(8) =4986a(9) =8042a(10) =12692a(11) =19583a(12) =29718a(13) =44323a(14) =65209a(15) =94641a(16) =135804a(17) =192698a(18) =270821a(19) =377047a(20) =520623a(21) =713122a(22) =969783a(23) =1309645a(24) =1757446a(25) =2343930a(26) =3108552a(27) =4100219