A165660 Denominators of A007504 divided by A033955, starting from the second term of A033955.

1, 3, 2, 8, 13, 18, 27, 29, 23, 56, 7, 74, 44, 98, 67, 49, 171, 200, 217, 28, 137, 309, 17, 116, 209, 448, 471, 174, 571, 629, 137, 739, 111, 793, 853, 318, 997, 1002, 560, 164, 610, 446, 1419, 1466, 385, 1615, 1573, 1633, 1707, 1825, 946, 662, 2221, 781, 1198

Offset

1,2

Comments

Conjecture: with the exception of the second term, 2 <= A165659(n)/a(n) < 3.

Links

Table of n, a(n) for n=1..55.

Prog

(PARI) a1(n)=sum(i=1, n, prime(i)); b1(n)=sum(i=1, n, prime(n+1)%prime(i)); a(n)=if(n<0, 0, denominator(a1(n)/b1(n))); for(n=1, 50, print1(a(n) ", "))

Crossrefs

Cf. A007504, A033995, A002110, A102647, A165657, A165658, A165659

Sequence in context: A094188 A088551 A301903 * A171634 A107300 A285787

Adjacent sequences: A165657 A165658 A165659 * A165661 A165662 A165663

Keyword

easy,nonn

Author

Creighton Dement, Sep 24 2009

Extensions

Terms corrected by Creighton Dement, Oct 03 2009

Removed a conjecture - R. J. Mathar, Oct 09 2009

Typo in definition corrected by Creighton Dement, Oct 09 2009

Status

approved