Mean integral divisors associated with A048751.

Terms

a(0) =9a(1) =16a(2) =9a(3) =25a(4) =288a(5) =49a(6) =972a(7) =121a(8) =41472a(9) =169a(10) =101250a(11) =289a(12) =1119744a(13) =361a(14) =320000a(15) =388962a(16) =529a(17) =1062882a(18) =1229312a(19) =841a(20) =3888000000a(21) =961a(22) =2371842a(23) =3001250a(24) =11609505792a(25) =1369a(26) =4626882a(27) =327680000a(28) =1681a(29) =29274835968