A046200 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

REFERENCES

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

LINKS

Table of n, a(n) for n=1..49.

EXAMPLE

1/1; --> 1

1/2, 1/2; -->

1/3, 1/6, 1/3; --> 3 3

1/4, 1/12, 1/12, 1/4; --> ...