A066988 a(n) = Product_{i=2..n} phi(i)/bigomega(i).

1, 2, 2, 8, 8, 48, 64, 192, 384, 3840, 5120, 61440, 184320, 737280, 1474560, 23592960, 47185920, 849346560, 2264924160, 13589544960, 67947724800, 1494849945600, 2989699891200, 29896998912000, 179381993472000

Offset

2,2

Links

Harry J. Smith, Table of n, a(n) for n = 2..150

Prog

(PARI) { a=1; for (n=2, 150, a*=eulerphi(n)/bigomega(n); write("b066988.txt", n, " ", a) ) } \\ Harry J. Smith, Apr 16 2010

Crossrefs

Sequence in context: A230928 A016119 A037223 * A100384 A000023 A333934

Adjacent sequences: A066985 A066986 A066987 * A066989 A066990 A066991

Keyword

nonn

Author

Benoit Cloitre, Jan 27 2002

Extensions

Definition corrected and Offset changed from 1 to 2 by Harry J. Smith, Apr 16 2010

Status

approved