A046200 Odd numbers in the triangle of denominators in Leibniz's Harmonic Triangle.

1, 3, 3, 5, 5, 7, 105, 105, 7, 9, 9, 11, 495, 495, 11, 13, 6435, 6435, 13, 15, 1365, 15015, 45045, 45045, 15015, 1365, 15, 17, 17, 19, 2907, 2907, 19, 21, 101745, 101745, 21, 23, 5313, 168245, 1716099, 1716099, 168245, 5313, 23, 25, 18386775, 18386775, 25

Offset: 1

Author

Mohammad K. Azarian

Keywords

• tabf
• nonn
• easy
• less

Examples

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

References

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

Crossrefs

Cf. A003506.

Extensions

More terms from James Sellers, Dec 13 1999