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A017606 a(n) = (12*n + 7)^2. 0

%I

%S 49,361,961,1849,3025,4489,6241,8281,10609,13225,16129,19321,22801,

%T 26569,30625,34969,39601,44521,49729,55225,61009,67081,73441,80089,

%U 87025,94249,101761,109561,117649

%N a(n) = (12*n + 7)^2.

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

%F G.f. ( -49-214*x-25*x^2 ) / (x-1)^3. - _R. J. Mathar_, Mar 10 2011

%F a(n) = a(n-1) + 288*n + 24, n >= 1. - _Vincenzo Librandi_, Mar 20 2011

%o (PARI) a(n)=(12*n+7)^2 \\ _Charles R Greathouse IV_, Jun 17 2017

%K nonn,easy

%O 0,1

%A _N. J. A. Sloane_

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Last modified May 7 12:05 EDT 2021. Contains 343650 sequences. (Running on oeis4.)