(Product of primes <= n) - 2^(n-1).

Terms

a(0) =0a(1) =0a(2) =2a(3) =-2a(4) =14a(5) =-2a(6) =146a(7) =82a(8) =-46a(9) =-302a(10) =1286a(11) =262a(12) =25934a(13) =21838a(14) =13646a(15) =-2738a(16) =444974a(17) =379438a(18) =9437546a(19) =9175402a(20) =8651114a(21) =7602538a(22) =218898566a(23) =214704262a(24) =206315654a(25) =189538438a(26) =155984006a(27) =88875142a(28) =6201257774a(29) =5932822318