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Search: id:A111745
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| A111745 |
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a(2k-1) = k-th prime congruent to 3 mod 4, a(2k) = k-th prime congruent to 1 mod 4. |
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+0
1
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| 3, 5, 7, 13, 11, 17, 19, 29, 23, 37, 31, 41, 43, 53, 47, 61, 59, 73, 67, 89, 71, 97, 79, 101, 83, 109, 103, 113, 107, 137, 127, 149, 131, 157, 139, 173, 151, 181, 163, 193, 167, 197, 179, 229, 191, 233, 199, 241, 211, 257, 223, 269, 227, 277, 239, 281, 251, 293, 263
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The graph shows the "race" between the two types of primes. - T. D. Noe (noe(AT)sspectra.com), Nov 15 2006
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FORMULA
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a(n)=A108546(n+1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 15 2008]
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CROSSREFS
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Cf. bisections A002144, A002145.
Sequence in context: A071810 A137576 A161329 this_sequence A098957 A143245 A018205
Adjacent sequences: A111742 A111743 A111744 this_sequence A111746 A111747 A111748
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KEYWORD
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nonn
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AUTHOR
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Jon Perry (perry(AT)globalnet.co.uk), Nov 19 2005
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EXTENSIONS
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Edited, corrected and extended by Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jul 19 2006
Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 15 2006
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