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15, 36, 63, 96, 135, 180, 231, 288, 351, 420, 495, 576, 663, 756, 855, 960, 1071, 1188, 1311, 1440, 1575, 1716, 1863, 2016, 2175, 2340, 2511, 2688, 2871, 3060, 3255, 3456, 3663, 3876, 4095, 4320, 4551, 4788, 5031, 5280, 5535, 5796, 6063, 6336, 6615, 6900
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Numbers such that 12 (12 + n) is a perfect square.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (3,-3,1).
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MATHEMATICA
| Select[ Range[10000], IntegerQ[ Sqrt[ 12(12 + # )]] & ]
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PROG
| (PARI) a(n)=3*n*(n+4) \\ Charles R Greathouse IV, Dec 07 2011
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CROSSREFS
| Cf. A067724-A067728 (3, 5, 6, 7, 8), A067705 (11).
Sequence in context: A134509 A062712 A033709 * A166146 A118867 A181362
Adjacent sequences: A067704 A067705 A067706 * A067708 A067709 A067710
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KEYWORD
| nonn,easy
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Feb 05 2002
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