A071842 - OEIS

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A071842

Number of primes == 7 mod 8 <= n.

0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,23`
	PROG	`(PARI) for(n=1, 200, print1(sum(i=1, n, if((i*isprime(i)-7)%8, 0, 1)), ", "))`
	CROSSREFS	`Sequence in context: A071840 A000193 A059939 * A085141 A082896 A079416` `Adjacent sequences: A071839 A071840 A071841 * A071843 A071844 A071845`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 08 2002`

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Last modified February 17 10:05 EST 2012. Contains 206009 sequences.