a(n) is the number of numbers removed in each step of Eratosthenes's sieve for 8!.

Terms

a(0) =20159a(1) =6719a(2) =2687a(3) =1535a(4) =836a(5) =642a(6) =454a(7) =381a(8) =297a(9) =223a(10) =204a(11) =170a(12) =154a(13) =146a(14) =134a(15) =119a(16) =108a(17) =103a(18) =92a(19) =84a(20) =81a(21) =76a(22) =70a(23) =64a(24) =56a(25) =53a(26) =51a(27) =47a(28) =45a(29) =42