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A086680 Number of primes < 4^n. +0
1
0, 2, 6, 18, 54, 172, 564, 1900, 6542, 23000, 82025, 295947, 1077871, 3957809, 14630843, 54400028 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A134635 A114464 A062415 this_sequence A094590 A004529 A000778

Adjacent sequences: A086677 A086678 A086679 this_sequence A086681 A086682 A086683

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard (hillcino368(AT)gmail.com), Jul 28 2003

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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