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A152742
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13 times the squares: 13n^2.
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6
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0, 13, 52, 117, 208, 325, 468, 637, 832, 1053, 1300, 1573, 1872, 2197, 2548, 2925, 3328, 3757, 4212, 4693, 5200, 5733, 6292, 6877, 7488, 8125, 8788, 9477, 10192, 10933, 11700, 12493, 13312, 14157, 15028, 15925, 16848, 17797, 18772
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..38.
Index entries for linear recurrences with constant coefficients, signature (3,-3,1).
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FORMULA
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a(n) = A000290(n)*13.
a(n)=a(n-1)+26*n-13 (with a(0)=0) [From Vincenzo Librandi, Nov 26 2010]
a(0)=0, a(1)=13, a(2)=52, a(n)=3*a(n-1)-3*a(n-2)+a(n-3). - Harvey P. Dale, Feb 18 2015
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MATHEMATICA
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13*Range[0, 40]^2 (* or *) LinearRecurrence[{3, -3, 1}, {0, 13, 52}, 40] (* Harvey P. Dale, Feb 18 2015 *)
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PROG
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(PARI) a(n)=13*n^2 \\ Charles R Greathouse IV, Oct 07 2015
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CROSSREFS
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Cf. A000290, A135453.
Sequence in context: A002792 A183941 A022673 * A213837 A047903 A197790
Adjacent sequences: A152739 A152740 A152741 * A152743 A152744 A152745
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol, Dec 12 2008
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STATUS
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approved
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