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Search: id:A129070
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| A129070 |
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Numbers n such that (n-5)/4 is prime. |
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+0
1
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| 13, 17, 25, 33, 49, 57, 73, 81, 97, 121, 129, 153, 169, 177, 193, 217, 241, 249, 273, 289, 297, 321, 337, 361, 393, 409, 417, 433, 441, 457, 513, 529, 553, 561, 601, 609, 633, 657, 673, 697, 721, 729, 769, 777, 793, 801, 849, 897, 913, 921, 937, 961, 969
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n) = 4*prime(n) + 5. - Zak Seidov, May 12 2007
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EXAMPLE
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For n=13, (13-5)/4 = 2 which is prime so 13 is the first entry.
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PROGRAM
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(PARI) g(m) = forprime(p=2, m, n=4*p+5; print1(n", "))
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CROSSREFS
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Cf. A000040.
Adjacent sequences: A129067 A129068 A129069 this_sequence A129071 A129072 A129073
Sequence in context: A126143 A125262 A104278 this_sequence A052491 A078138 A092626
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)hotmail.com), May 11 2007, May 17 2007
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