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A165661 Triangle read by rows: denominator of n/binomial(n,m). 2
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 5, 10, 5, 1, 1, 1, 1, 3, 5, 5, 3, 1, 1, 1, 1, 7, 7, 35, 7, 7, 1, 1, 1, 1, 4, 28, 14, 14, 28, 4, 1, 1, 1, 1, 9, 12, 21, 126, 21, 12, 9, 1, 1, 1, 1, 5, 15, 30, 42, 42, 30, 15, 5, 1, 1, 1, 1, 11, 55, 165, 66, 77, 66, 165, 55, 11, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,13

COMMENTS

First difference from A107711 is at T(10,4) = 21 instead of 42.

LINKS

Table of n, a(n) for n=0..90.

FORMULA

T(n,m) = binomial(n,m)/gcd(n,binomial(n,m)).

CROSSREFS

Cf. A159335 (numerators), A107711, A007318, A109004.

Sequence in context: A143811 A109673 A023591 * A107711 A242345 A179067

Adjacent sequences:  A165658 A165659 A165660 * A165662 A165663 A165664

KEYWORD

frac,nonn,tabl

AUTHOR

Franklin T. Adams-Watters, Sep 24 2009

STATUS

approved

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Last modified November 26 17:52 EST 2021. Contains 349343 sequences. (Running on oeis4.)