A127520 a(n) = denominator of sum{k=1 to n} 1/A127518(k).

1, 3, 24, 120, 120, 840, 840, 840, 280, 2520, 27720, 27720, 360360, 360360, 360360, 720720, 12252240, 4084080, 77597520, 15519504, 15519504, 5173168, 118982864, 356948592, 8923714800, 80313433200, 80313433200, 80313433200, 2329089562800

Offset

1,2

Links

Table of n, a(n) for n=1..29.

Crossrefs

Cf. A127518, A127519.

Sequence in context: A253944 A139031 A065692 * A175115 A301812 A268633

Adjacent sequences: A127517 A127518 A127519 * A127521 A127522 A127523

Keyword

frac,nonn

Author

Leroy Quet, Jan 17 2007

Extensions

Extended by Ray Chandler, Jan 22 2007

Status

approved