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A123080
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Twin primes of form 4k+3.
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0
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3, 7, 11, 19, 31, 43, 59, 71, 103, 107, 139, 151, 179, 191, 199, 227, 239, 271, 283, 311, 347, 419, 431, 463, 523, 571, 599, 619, 643, 659, 811, 823, 827, 859, 883, 1019, 1031, 1051, 1063, 1091, 1151, 1231, 1279, 1291, 1303, 1319, 1427, 1451, 1483, 1487, 1607
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MAPLE
| i:=1:for k from 1 to 3000 do if isprime(k) and isprime(k+2) then b:=k:c:=k+2: if b mod 4 = 3 then a[i]:=b:i:=i+1 fi: if c mod 4 = 3 then a[i]:=c:i:=i+1 fi:fi od: seq(a[n], n=1..i-1);
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MATHEMATICA
| Select[Flatten[Select[Partition[Prime[Range[260]], 2, 1], Last[#]-First[#] == 2&]], IntegerQ[(#-3)/4]&] (* From Harvey P. Dale, Apr 20 2011 *)
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CROSSREFS
| Cf. A122564, A122565, A001097.
Sequence in context: A126254 A092102 A158722 * A161387 A022406 A132447
Adjacent sequences: A123077 A123078 A123079 * A123081 A123082 A123083
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KEYWORD
| nonn
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AUTHOR
| Miklos Kristof (kristmikl(AT)freemail.hu), Sep 27 2006
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