A046201 Distinct odd numbers in the triangle of denominators in Leibniz's Harmonic Triangle.

1, 3, 5, 7, 105, 9, 11, 495, 13, 6435, 15, 1365, 15015, 45045, 17, 19, 2907, 21, 101745, 23, 5313, 168245, 1716099, 25, 18386775, 27, 8775, 42181425, 143416845, 29, 593775, 90135045, 882230895, 31, 13485, 849555, 18407025, 181440675

Offset

1,2

References

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 83, Problem 25.

Links

Table of n, a(n) for n=1..38.

Example

1/1; 1/2, 1/2; 1/3, 1/6, 1/3; 1/4, 1/12, 1/12, 1/4; 1/5, 1/20, 1/30, 1/20, 1/5; ...

Crossrefs

Cf. A003506, A046202.

Sequence in context: A104388 A110337 A132287 * A292848 A128344 A259385

Adjacent sequences: A046198 A046199 A046200 * A046202 A046203 A046204

Keyword

tabf,nonn,easy

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 13 1999

Status

approved