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A174902 Denominator of 1 - 1/n^2, using 0 at the pole where n=0. 1

%I #14 Jul 25 2015 09:42:50

%S 1,0,1,4,9,16,25,36,49,64,81,100,121,144,169,196,225,256,289,324,361,

%T 400,441,484,529,576,625,676,729,784,841,900,961,1024,1089,1156,1225,

%U 1296,1369,1444,1521,1600,1681,1764,1849,1936,2025

%N Denominator of 1 - 1/n^2, using 0 at the pole where n=0.

%C From Lyman antispectrum of hydrogen.

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1).

%F a(n) = A000290(n), n>=0.

%o (PARI) a(n)=n^2 \\ _Charles R Greathouse IV_, Nov 26 2012

%Y Main sequence is A000290.

%K nonn,easy,less

%O -1,4

%A _Paul Curtz_, Dec 02 2010

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Last modified March 28 12:26 EDT 2024. Contains 371254 sequences. (Running on oeis4.)