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18, 48, 90, 144, 210, 288, 378, 480, 594, 720, 858, 1008, 1170, 1344, 1530, 1728, 1938, 2160, 2394, 2640, 2898, 3168, 3450, 3744, 4050, 4368, 4698, 5040, 5394, 5760, 6138, 6528, 6930, 7344, 7770, 8208, 8658, 9120, 9594, 10080, 10578, 11088, 11610
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Numbers such that 6 (6 + 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[15000], IntegerQ[ Sqrt[ 6(6 + # )]] & ]
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PROG
| (PARI) a(n)=6*n*(n+2) \\ Charles R Greathouse IV, Dec 07 2011
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CROSSREFS
| Cf. 8: A067728, 7: A067727, 5: A067724, 3: A067725.
Sequence in context: A034132 A099119 A105520 * A135189 A178398 A071365
Adjacent sequences: A067723 A067724 A067725 * A067727 A067728 A067729
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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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