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A046200 Odd numbers in the triangle of denominators in Leibniz's Harmonic Triangle. 0
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; --> ...

1/5, 1/20, 1/30, 1/20, 1/5; ...

CROSSREFS

Cf. A003506.

Sequence in context: A142712 A247577 A282207 * A063281 A117772 A026924

Adjacent sequences:  A046197 A046198 A046199 * A046201 A046202 A046203

KEYWORD

tabf,nonn,easy,less

AUTHOR

Mohammad K. Azarian

EXTENSIONS

More terms from James A. Sellers, Dec 13 1999

STATUS

approved

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Last modified November 13 01:32 EST 2018. Contains 317118 sequences. (Running on oeis4.)