Integer part of Chebyshev's theta function: floor( log(Product_{k=1..n} prime(k)) ).

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =7a(5) =10a(6) =13a(7) =16a(8) =19a(9) =22a(10) =26a(11) =29a(12) =33a(13) =37a(14) =40a(15) =44a(16) =49a(17) =53a(18) =57a(19) =61a(20) =65a(21) =70a(22) =74a(23) =79a(24) =83a(25) =88a(26) =92a(27) =97a(28) =102a(29) =107