a(n) = floor(Product_{i=1..n} log(prime(i+1))/log(i+1)).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =10a(6) =14a(7) =20a(8) =29a(9) =42a(10) =62a(11) =90a(12) =128a(13) =182a(14) =261a(15) =376a(16) =535a(17) =764a(18) =1087a(19) =1532a(20) =2166a(21) =3052a(22) =4311a(23) =6128a(24) =8680a(25) =12207a(26) =17118a(27) =23849a(28) =33148a(29) =46761