Number of divisors d of n! such that d+1 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =9a(5) =15a(6) =27a(7) =40a(8) =63a(9) =100a(10) =180a(11) =248a(12) =459a(13) =696a(14) =1019a(15) =1299a(16) =2495a(17) =3219a(18) =6011a(19) =7986a(20) =11247a(21) =17029a(22) =32567a(23) =39501a(24) =53017a(25) =79775a(26) =97251a(27) =126981a(28) =245675a(29) =301054