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A073881 a(n) = smallest number m (obviously prime) such that pi(m) = 2*pi(n). 0
1, 3, 7, 7, 13, 13, 19, 19, 19, 19, 29, 29, 37, 37, 37, 37, 43, 43, 53, 53, 53, 53, 61, 61, 61, 61, 61, 61, 71, 71, 79, 79, 79, 79, 79, 79, 89, 89, 89, 89, 101, 101, 107, 107, 107, 107, 113, 113, 113, 113, 113, 113, 131, 131, 131, 131, 131, 131, 139, 139, 151, 151 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..61.

CROSSREFS

Sequence in context: A109386 A024612 A227025 * A137315 A139795 A290649

Adjacent sequences:  A073878 A073879 A073880 * A073882 A073883 A073884

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Aug 16 2002

EXTENSIONS

More terms from Jason Earls, Aug 22 2002

STATUS

approved

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Last modified May 12 23:35 EDT 2021. Contains 343829 sequences. (Running on oeis4.)