Number of 10-almost primes k such that 2^n < k <= 2^(n+1).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =1a(10) =1a(11) =5a(12) =8a(13) =22a(14) =47a(15) =103a(16) =233a(17) =487a(18) =1072a(19) =2246a(20) =4803a(21) =10202a(22) =21440a(23) =45115a(24) =94434a(25) =197891a(26) =412010a(27) =858846a(28) =1783610a(29) =3700698