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Search: id:A117951
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| 5, 6, 9, 14, 21, 30, 41, 54, 69, 86, 105, 126, 149, 174, 201, 230, 261, 294, 329, 366, 405, 446, 489, 534, 581, 630, 681, 734, 789, 846, 905, 966, 1029, 1094, 1161, 1230, 1301, 1374, 1449, 1526, 1605, 1686, 1769, 1854, 1941, 2030, 2121, 2214, 2309, 2406, 2505
(list; graph; listen)
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OFFSET
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0,1
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LINKS
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Eric Weisstein's World of Mathematics, Near-Square Prime
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FORMULA
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a(n)=2*n+a(n-1)-3 (with a(1)=5) [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+5-3=6; n=3, a(3)=2*3+6-3=9; n=4, a(4)=2*4+9-3=14 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 07 2009]
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MATHEMATICA
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lst={}; Do[AppendTo[lst, n^2+5], {n, 0, 6!, 1}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 07 2008]
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PROGRAM
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(Other) sage: [lucas_number1(3, n, -5) for n in xrange(0, 51)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 16 2009]
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CROSSREFS
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For numbers n such that n^2 + 5 is prime, see A078402
Sequence in context: A082576 A074185 A047438 this_sequence A124519 A154311 A014980
Adjacent sequences: A117948 A117949 A117950 this_sequence A117952 A117953 A117954
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KEYWORD
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nonn,easy
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com), Apr 04, 2006
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