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A176656 The positions of single (or isolated or non-twin) primes in A000040. 3
1, 9, 12, 15, 16, 19, 22, 23, 24, 25, 30, 31, 32, 37, 38, 39, 40, 47, 48, 51, 54, 55, 56, 59, 62, 63, 66, 67, 68, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 85, 86, 87, 88, 91, 92, 93, 94, 95, 96, 97, 100, 101, 102, 103, 106, 107, 108, 111, 112, 115, 118, 119, 122, 123, 124 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..65.

FORMULA

A000040(a(n))=A007510(k).

MAPLE

A176656 := proc(n) numtheory[pi](A007510(n)) ; end proc: seq(A176656(n), n=1..120) ; # R. J. Mathar, Apr 26 2010

CROSSREFS

Sequence in context: A009188 A138299 A050435 * A248903 A138945 A119486

Adjacent sequences:  A176653 A176654 A176655 * A176657 A176658 A176659

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Apr 23 2010

EXTENSIONS

Corrected (32 inserted, one of the 94 removed, 103 inserted, 121 replaced by 122) by R. J. Mathar, Apr 26 2010

STATUS

approved

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Last modified January 16 23:44 EST 2019. Contains 319206 sequences. (Running on oeis4.)