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A139750 Numbers n such that d_1^1 + ... + d_r^r is a prime number, where d_i are the digits of n (n = concatenation of d_1, d_2, ..., d_r). +0
3
2, 3, 5, 7, 11, 12, 14, 16, 20, 21, 23, 29, 30, 32, 34, 38, 41, 43, 45, 47, 50, 56, 61, 65, 70, 72, 74, 76, 78, 83, 89, 92, 98, 101, 110, 111, 113, 115, 120, 122, 131, 133, 137, 139, 140, 146, 153, 155, 160, 164, 182, 186, 188, 191, 193, 199, 200, 201, 203, 205, 210 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Cf. A139752.

Sequence in context: A119251 A028835 A028834 this_sequence A139749 A165132 A039715

Adjacent sequences: A139747 A139748 A139749 this_sequence A139751 A139752 A139753

KEYWORD

base,easy,nonn,less

AUTHOR

Ctibor O. Zizka (ctibor.zizka(AT)seznam.cz), May 19 2008

EXTENSIONS

Edited and extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), May 21 2008

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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