A227907 - OEIS

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A227907

Primes p such that 4*p - q is also prime, where p, q are consecutive primes.

2, 3, 5, 7, 11, 19, 37, 67, 71, 79, 137, 191, 229, 277, 283, 317, 347, 359, 397, 409, 431, 457, 461, 479, 499, 577, 691, 739, 743, 757, 787, 811, 829, 839, 967, 1009, 1061, 1087, 1091, 1109, 1153, 1193, 1279, 1327, 1373, 1429 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..46.`
	MAPLE	`isA227907 := proc(n)` `local q;` `if isprime(n) then` `q := nextprime(n) ;` `isprime(4*n-q) ;` `else` `false;` `end if;` `end proc:` `for n from 1 to 3000 do` `if isA227907(n) then` `printf("%d, ", n) ;` `end if;` `end do: # R. J. Mathar, Oct 14 2013`
	PROG	`(PARI) isokp(p) = isprime(p) && isprime(4*p - nextprime(p+1)); \\ Michel Marcus, Oct 13 2013`
	CROSSREFS	`Sequence in context: A057429 A065726 A215161 * A118985 A092728 A089769` `Adjacent sequences: A227904 A227905 A227906 * A227908 A227909 A227910`
	KEYWORD	`nonn`
	AUTHOR	`Irina Gerasimova, Oct 12 2013`
	STATUS	`approved`

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Last modified September 11 03:39 EDT 2015. Contains 261513 sequences.