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A168543 pi(n-th single or isolated number). 1
1, 2, 3, 5, 7, 9, 10, 12, 13, 15, 16, 17, 19, 20, 22, 23, 24, 25, 26, 28, 30, 31, 32, 33, 35, 37, 38, 39, 40, 41, 43, 45, 47, 48, 49, 51, 52, 54, 55, 56, 57, 59, 60, 62, 63, 64, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..71.

FORMULA

a(n)=A000720(A167706(n)).

CROSSREFS

Sequence in context: A117284 A137377 A274793 * A026277 A201804 A245227

Adjacent sequences:  A168540 A168541 A168542 * A168544 A168545 A168546

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Nov 29 2009

EXTENSIONS

Corrected (25 inserted) by R. J. Mathar, Nov 30 2009

STATUS

approved

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Last modified November 19 16:37 EST 2019. Contains 329323 sequences. (Running on oeis4.)