login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A165661 Triangle read by rows: denominator of n/binomial(n,m). 2

%I

%S 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,

%T 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,

%U 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

%N Triangle read by rows: denominator of n/binomial(n,m).

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

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

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

%K frac,nonn,tabl

%O 0,13

%A _Franklin T. Adams-Watters_, Sep 24 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 21 10:20 EST 2022. Contains 350476 sequences. (Running on oeis4.)