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Search: id:A017377
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| 9, 19, 29, 39, 49, 59, 69, 79, 89, 99, 109, 119, 129, 139, 149, 159, 169, 179, 189, 199, 209, 219, 229, 239, 249, 259, 269, 279, 289, 299, 309, 319, 329, 339, 349, 359, 369, 379, 389, 399, 409, 419, 429, 439, 449
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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For many of these numbers n (9, 19, 69, 79, 109, 119, 129, etc,), (n^2+4)/5 is prime. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 09 2009]
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LINKS
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Tanya Khovanova, Recursive Sequences
INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 979
Index entries for sequences related to dismal arithmetic
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MAPLE
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with(finance):seq(add(cashflows([3, 3, 4], 0 ), k=1..n)-1, n=1..45); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 21 2008
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PROGRAM
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(Other) sage: [i+9 for i in range(500) if gcd(i, 10) == 10] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 20 2009]
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CROSSREFS
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Cf. A154418, A154419 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 09 2009]
Sequence in context: A088479 A043525 A031499 this_sequence A056126 A051811 A034056
Adjacent sequences: A017374 A017375 A017376 this_sequence A017378 A017379 A017380
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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