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24, 46, 72, 102, 136, 174, 216, 262, 312, 366, 424, 486, 552, 622, 696, 774, 856, 942, 1032, 1126, 1224, 1326, 1432, 1542, 1656, 1774, 1896, 2022, 2152, 2286, 2424, 2566, 2712, 2862, 3016, 3174, 3336, 3502, 3672, 3846, 4024, 4206, 4392, 4582, 4776, 4974, 5176
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Eighth diagonal [A144562]; 2*a(n)+52 is a square.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (3,-3,1).
Harvey P. Dale, Table of n, a(n) for n = 1..1000
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FORMULA
| a(n) = 2*A116711(n+3).
G.f.: -2*x*(3*x-4)*(x-3)/(x-1)^3.
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MATHEMATICA
| Table[2n^2+16n+6, {n, 50}] (* or *) LinearRecurrence[{3, -3, 1}, {24, 46, 72}, 50] (* From Harvey P. Dale, Dec 27 2011 *)
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CROSSREFS
| Cf. A144562, A067076, A153238
Sequence in context: A055480 A000496 A063323 * A028992 A040552 A199545
Adjacent sequences: A154587 A154588 A154589 * A154591 A154592 A154593
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KEYWORD
| nonn,easy
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 12 2009
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EXTENSIONS
| Corrected (a[31) added) by Harvey P. Dale, Dec 27 2011
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