A046204 Distinct even numbers in the triangle of denominators in Leibniz's Harmonic Triangle.

2, 6, 4, 12, 20, 30, 60, 42, 140, 8, 56, 168, 280, 72, 252, 504, 630, 10, 90, 360, 840, 1260, 110, 1320, 2310, 2772, 132, 660, 1980, 3960, 5544, 156, 858, 2860, 10296, 12012, 14, 182, 1092, 4004, 10010, 18018, 24024, 210, 5460, 30030, 51480, 16, 240

Offset: 1

Author

Mohammad K. Azarian

Keywords

• tabf
• nonn
• easy

Examples

			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; ...
		

References

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

Crossrefs

Cf. A003506.

Extensions

More terms from James Sellers, Dec 13 1999