A130502 a(n) = numerator of the sum of reciprocals of those positive integers which are <= n and are not among earlier terms of A130502.

1, 1, 5, 13, 13, 5, 39, 85, 821, 4357, 50447, 52757, 52757, 54737, 11317, 23327, 407647, 139373, 2710919, 13853047, 4712429, 4802869, 112455667, 343087331, 1742894239, 23000844907, 209982175763, 212850512663, 6252978300427

Offset

1,3

Links

Diana Mecum, Table of n, a(n) for n = 1..100

Example

The positive integers which are <= 9 and are missing from the first 8 terms of this (numerator) sequence are 2,3,4,6,7,8,9. So a(9) is the numerator of (1/2 +1/3 +1/4 +1/6 +1/7 +1/8 + 1/9 = 821/504).

Crossrefs

Cf. A130503.

Sequence in context: A222756 A094150 A375275 * A320814 A274302 A274300

Adjacent sequences: A130499 A130500 A130501 * A130503 A130504 A130505

Keyword

frac,nonn

Author

Leroy Quet, May 31 2007

Extensions

More terms from Diana L. Mecum, May 29 2007

Status

approved