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1, 49, 169, 361, 625, 961, 1369, 1849, 2401, 3025, 3721, 4489, 5329, 6241, 7225, 8281, 9409, 10609, 11881, 13225, 14641, 16129, 17689, 19321, 21025, 22801, 24649, 26569, 28561, 30625, 32761, 34969
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Except for 2, exponents e such that x^e-x+1 is reducible.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..2000
Index to sequences with linear recurrences with constant coefficients, signature (3,-3,1).
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FORMULA
| G.f. ( -1-46*x-25*x^2 ) / (x-1)^3 . - R. J. Mathar, Mar 10 2011
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PROG
| (MAGMA) [(6*n+1)^2: n in [0..60]]; // Vincenzo Librandi, May 04 2011
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CROSSREFS
| Sequence in context: A009409 A009431 A074216 * A147608 A039686 A038628
Adjacent sequences: A016919 A016920 A016921 * A016923 A016924 A016925
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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