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0, 8, 18, 30, 44, 60, 78, 98, 120, 144, 170, 198, 228, 260, 294, 330, 368, 408, 450, 494, 540, 588, 638, 690, 744, 800, 858, 918, 980, 1044, 1110, 1178, 1248, 1320, 1394, 1470, 1548, 1628, 1710, 1794, 1880, 1968, 2058, 2150, 2244
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| P. De Geest, Palindromic Quasipronics of the form n(n+x)
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FORMULA
| Equals 2*A055999. - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 12 2007
a(n)=2*n+a(n-1)+6. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
sum_{n>=1} 1/a(n) = 363/980 = 0.37040816... - R. J. Mathar, Mar 22 2011
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MAPLE
| with (combinat):seq(fibonacci(3, n)+n-13, n=3..47); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 07 2008
with(finance):seq(add(cashflows([2, k, k], 0 ), k=3..n), n=2..51); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 30 2008
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MATHEMATICA
| lst={}; Do[AppendTo[lst, n*(n+7)], {n, 0, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 06 2008]
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CROSSREFS
| Cf. A002522.
Sequence in context: A085248 A092163 A100592 * A171523 A120091 A098944
Adjacent sequences: A028560 A028561 A028562 * A028564 A028565 A028566
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KEYWORD
| nonn
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com)
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