Number of 7-almost primes less than or equal to 10^n.
A120048
Number of 7-almost primes less than or equal to 10^n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =14a(4) =231a(5) =2973a(6) =35585a(7) =409849a(8) =4600247a(9) =50678212a(10) =550454756a(11) =5913771637a(12) =62981797962a(13) =665997804082
External references
- oeis: A120048