A123079 - OEIS

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A123079

Twin primes of form 4k+1.

5, 13, 17, 29, 41, 61, 73, 101, 109, 137, 149, 181, 193, 197, 229, 241, 269, 281, 313, 349, 421, 433, 461, 521, 569, 601, 617, 641, 661, 809, 821, 829, 857, 881, 1021, 1033, 1049, 1061, 1093, 1153, 1229, 1277, 1289, 1301, 1321, 1429, 1453, 1481, 1489, 1609 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	MAPLE	`a[1]:=5:i:=2:for k from 6 to 3000 do if isprime(k) and isprime(k+2) then b:=k:c:=k+2: if b mod 4 = 1 then a[i]:=b:i:=i+1 fi: if c mod 4 = 1 then a[i]:=c:i:=i+1 fi:fi od: seq(a[n], n=1..i-1);`
	CROSSREFS	`Cf. A122564, A122565, A001097.` `Sequence in context: A192592 A111055 A145016 * A038938 A184851 A191108` `Adjacent sequences: A123076 A123077 A123078 * A123080 A123081 A123082`
	KEYWORD	`nonn`
	AUTHOR	`Miklos Kristof (kristmikl(AT)freemail.hu), Sep 27 2006`

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Last modified February 17 05:54 EST 2012. Contains 205985 sequences.