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Search: id:A027693
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| A027693 |
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Numbers of form n^2 + (n+8). |
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+0
3
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| 8, 10, 14, 20, 28, 38, 50, 64, 80, 98, 118, 140, 164, 190, 218, 248, 280, 314, 350, 388, 428, 470, 514, 560, 608, 658, 710, 764, 820, 878, 938, 1000, 1064, 1130, 1198, 1268, 1340, 1414, 1490, 1568, 1648, 1730, 1814, 1900, 1988, 2078, 2170
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Except for the first term, a(n)=2*n+a(n-1), (with a(1)=10) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Oct 23 2009]
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LINKS
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P. De Geest, Palindromic Quasi_Over_Squares of the form n^2+(n+X)
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FORMULA
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a(n)=2*n+a(n-1)-2 (with a(1)=8) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 07 2009]
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EXAMPLE
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For n=2, a(2)=2*2+8-2=10; n=3, a(3)=2*3+10-2=14; n=4, a(4)=2*4+14-2=20 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 07 2009]
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MAPLE
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with (combinat):seq(fibonacci(3, n)+n+7, n=0..46); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 07 2008
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CROSSREFS
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Cf. A002522.
Sequence in context: A060864 A087695 A134321 this_sequence A100718 A063190 A101763
Adjacent sequences: A027690 A027691 A027692 this_sequence A027694 A027695 A027696
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KEYWORD
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nonn
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com)
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