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A205667 Numbers containing exactly one prime in decimal representation. 3
2, 3, 5, 7, 11, 12, 15, 19, 20, 21, 22, 24, 26, 28, 30, 33, 34, 36, 38, 39, 41, 42, 45, 50, 51, 54, 55, 56, 58, 61, 62, 63, 65, 70, 74, 76, 77, 78, 82, 85, 87, 89, 92, 93, 95, 101, 102, 105, 109, 110, 111, 114, 116, 118, 120, 121, 122, 124, 126, 128, 141 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A039997(a(n)) = 1.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

EXAMPLE

A039997(10) = #{} = 0, therefore 10 is not a term;

A039997(11) = #{11} = 1, therefore 11 is a term;

A039997(12) = #{2} = 1, therefore 12 is a term;

A039997(13) = #{3, 13} = 2, therefore 13 is not a term.

PROG

(Haskell)

a205667 n = a205667_list !! (n-1)

a205667_list = filter ((== 1) . a039997) [0..]

-- Reinhard Zumkeller, Jan 31 2012

CROSSREFS

Subsequence of A163753.

Sequence in context: A330125 A139749 A178357 * A241506 A165132 A193063

Adjacent sequences:  A205664 A205665 A205666 * A205668 A205669 A205670

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Jan 31 2012

STATUS

approved

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Last modified July 3 16:12 EDT 2022. Contains 355055 sequences. (Running on oeis4.)