A156148 - OEIS

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A156148

Numbers n such that prime(prime(n))+2 = 0 (mod prime(n)), where prime(p)=A000040(p) is the p-th prime.

5, 20, 51891, 51893 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`a(n) = A000720(A156149(n))`
	PROG	`(PARI) p=c=0; until(0, until( isprime(c++), p=nextprime(p+1)); (p+2)%c & next; print1( primepi(c)", "))`
	CROSSREFS	`Cf. A156155.` `Sequence in context: A032072 A002030 A202860 * A156824 A053002 A053003` `Adjacent sequences: A156145 A156146 A156147 * A156149 A156150 A156151`
	KEYWORD	`hard,more,nonn`
	AUTHOR	`M. F. Hasler (www.univ-ag.fr/~mhasler), Feb 04 2009`

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Last modified February 17 02:08 EST 2012. Contains 205978 sequences.