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8, 36, 64, 92, 120, 148, 176, 204, 232, 260, 288, 316, 344, 372, 400, 428, 456, 484, 512, 540, 568, 596, 624, 652, 680, 708, 736, 764, 792, 820, 848, 876, 904, 932, 960, 988, 1016, 1044, 1072, 1100, 1128, 1156, 1184, 1212, 1240, 1268, 1296, 1324, 1352, 1380
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OFFSET
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0,1
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COMMENTS
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Numbers of the 8th column of positive numbers in the square array of nonnegative and polygonal numbers A139600. Also, numbers of the 8th column in the square array A057145.
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REFERENCES
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A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, p. 189. - From N. J. A. Sloane, Dec 01 2012
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index to sequences with linear recurrences with constant coefficients, signature (2,-1).
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FORMULA
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a(0)=8, a(1)=36, a(n)=2*a(n-1)-a(n-2). - Harvey P. Dale, Dec 14 2012
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MATHEMATICA
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Range[8, 7000, 28] (* From Vladimir Joseph Stephan Orlovsky, Jul 13 2011 *)
LinearRecurrence[{2, -1}, {8, 36}, 50] (* or *) NestList[28+#&, 8, 50] (* Harvey P. Dale, Dec 14 2012 *)
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PROG
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(MAGMA) [4*(7*n + 2): n in [0..50]]; // Vincenzo Librandi, Jul 13 2011
(PARI) a(n)=28*n+8 \\ Charles R Greathouse IV, Oct 05 2011
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CROSSREFS
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Sequence in context: A184294 A057345 A048740 * A009923 A187287 A224159
Adjacent sequences: A139605 A139606 A139607 * A139609 A139610 A139611
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KEYWORD
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easy,nonn,changed
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AUTHOR
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Omar E. Pol, Apr 27 2008
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STATUS
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approved
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