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A139789 Numbers of primes < nth-prime such that prime(n) + 4 is prime. +0
2
0, 1, 1, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9 (list; graph; listen)
OFFSET

1,4
CROSSREFS

Cf. A082462.

Adjacent sequences: A139786 A139787 A139788 this_sequence A139790 A139791 A139792

Sequence in context: A000720 A070549 A074796 this_sequence A061070 A117695 A074794

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), May 21 2008

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.

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