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Search: id:A017365
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| 8, 18, 28, 38, 48, 58, 68, 78, 88, 98, 108, 118, 128, 138, 148, 158, 168, 178, 188, 198, 208, 218, 228, 238, 248, 258, 268, 278, 288, 298, 308, 318, 328, 338, 348, 358, 368, 378, 388, 398, 408, 418, 428, 438, 448
(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 (8, 28, 48, 58, 78, 88, 108, 158, etc,), (n^2+1)/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
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PROGRAM
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(Other) sage: [i+8 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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Cf. A154414 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 09 2009]
Sequence in context: A051370 A011538 A043521 this_sequence A084394 A085248 A092163
Adjacent sequences: A017362 A017363 A017364 this_sequence A017366 A017367 A017368
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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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