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Denominator of 1/36 - 1/n^2.
7

%I #16 Jul 07 2017 03:37:45

%S 36,9,12,144,900,1,1764,576,324,225,4356,48,6084,441,300,2304,10404,

%T 81,12996,3600,196,1089,19044,192,22500,1521,2916,7056,30276,75,34596,

%U 9216,484,2601,44100,1296,49284,3249,2028,14400,60516,147,66564,17424,8100,4761,79524,256,86436,5625,3468,24336,101124,729,108900,28224,4332,7569,125316,400,133956,8649,15876,36864,152100,363,161604,41616,6348,11025,181476,5184

%N Denominator of 1/36 - 1/n^2.

%H Reinhard Zumkeller, <a href="/A061046/b061046.txt">Table of n, a(n) for n = 1..10000</a>

%t Denominator[1/36-1/Range[80]^2] (* _Harvey P. Dale_, Feb 06 2012 *)

%o (Haskell)

%o import Data.Ratio ((%), denominator)

%o a061046 = denominator . (1 % 36 -) . recip . (^ 2) . fromIntegral

%o -- _Reinhard Zumkeller_, Jan 06 2014

%o (PARI) for(n=6,50, print1(denominator(1/6^2 - 1/n^2), ", ")) \\ _G. C. Greubel_, Jul 07 2017

%Y See A061045 for numerators and further information. Cf. A061035-A061050.

%K nonn,frac

%O 1,1

%A _N. J. A. Sloane_, May 26 2001