Denominator of the harmonic mean of the first n composite numbers.

Terms

a(0) =1a(1) =5a(2) =13a(3) =47a(4) =271a(5) =301a(6) =2287a(7) =491a(8) =1045a(9) =367a(10) =1919a(11) =1999a(12) =22829a(13) =23599a(14) =121691a(15) =1628183a(16) =15054047a(17) =15440147a(18) =15800507a(19) =32276689a(20) =32931889a(21) =570652913a(22) =83022119a(23) =84480719a(24) =1631388461a(25) =1656970061a(26) =1681912121a(27) =11939665247a(28) =12098387447a(29) =12253582487