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2, 9, 18, 29, 42, 57, 74, 93, 114, 137, 162, 189, 218, 249, 282, 317, 354, 393, 434, 477, 522, 569, 618, 669, 722, 777, 834, 893, 954, 1017, 1082, 1149, 1218, 1289, 1362, 1437, 1514, 1593, 1674, 1757, 1842, 1929, 2018, 2109, 2202, 2297, 2394
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,1
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LINKS
| P. De Geest, Palindromic Quasipronics of the form n(n+x)
Index entries for sequences related to linear recurrences with constant coefficients, signature (3,-3,1).
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FORMULA
| a(n)=2*n+a(n-1)-1 (with a(3)=2) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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EXAMPLE
| a(4)=2*4+2-1=9; a(5)=2*5+9-1=18; a(6)=2*6+18-1=29 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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MATHEMATICA
| s=0; lst={}; Do[s+=n; If[(s-7)>0, AppendTo[lst, s-7]], {n, 1, 6!, 2}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), May 25 2009]
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PROG
| (Other) SAGE:[lucas_number2(2, n, 3-n) for n in xrange(2, 49)]# [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 12 2009]
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CROSSREFS
| Sequence in context: A126082 A083707 A103256 * A200085 A083708 A191520
Adjacent sequences: A028878 A028879 A028880 * A028882 A028883 A028884
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KEYWORD
| nonn,easy
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com)
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