A205667 Numbers containing exactly one prime in decimal representation.

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

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 A361851 A165132

Adjacent sequences: A205664 A205665 A205666 * A205668 A205669 A205670

Keyword

nonn,base

Author

Reinhard Zumkeller, Jan 31 2012

Status

approved