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Search: id:A017353
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| 7, 17, 27, 37, 47, 57, 67, 77, 87, 97, 107, 117, 127, 137, 147, 157, 167, 177, 187, 197, 207, 217, 227, 237, 247, 257, 267, 277, 287, 297, 307, 317, 327, 337, 347, 357, 367, 377, 387, 397, 407, 417, 427, 437, 447
(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 (7, 17, 27, 37, 67, 77, 87, 97, etc), (n^2+1)/10 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
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PROGRAM
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(Other) sage: [i+7 for i in range(448) if gcd(i, 10) == 10] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 20 2009]
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CROSSREFS
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Sequence in context: A072199 A011537 A043517 this_sequence A160912 A147089 A045575
Adjacent sequences: A017350 A017351 A017352 this_sequence A017354 A017355 A017356
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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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