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A061238
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Prime numbers == 2 (mod 9).
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6
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2, 11, 29, 47, 83, 101, 137, 173, 191, 227, 263, 281, 317, 353, 389, 443, 461, 479, 569, 587, 641, 659, 677, 821, 839, 857, 911, 929, 947, 983, 1019, 1091, 1109, 1163, 1181, 1217, 1289, 1307, 1361, 1433, 1451, 1487, 1523, 1559, 1613, 1667, 1721, 1811, 1847
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| A010888(a(n)) = 2. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 25 2005
Except for the first term "2", all current prime numbers are of the form: 18*n-7. -- (* From Vladimir Joseph Stephan Orlovsky, Jul 13 2011 *)
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MATHEMATICA
| Select[ Range[ 2000 ], PrimeQ[ # ] && Mod[ #, 9 ] == 2 & ]
Join[{2}, Select[Range[11, 5000, 18], PrimeQ]] (* From Vladimir Joseph Stephan Orlovsky, Jul 13 2011 *) (* ~30 times faster *)
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PROG
| (MAGMA)[ p: p in PrimesUpTo(2000) | p mod 9 in {2} ]; [From Vincenzo Librandi, Dec 25 2010]
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CROSSREFS
| Cf. A061237-A061242.
Sequence in context: A192361 A136317 A090389 * A046500 A062123 A117560
Adjacent sequences: A061235 A061236 A061237 * A061239 A061240 A061241
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 23 2001
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), May 10 2001
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