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A141409 Prime numbers that cannot be formed by the concatenation of previous terms. +0
1
2, 3, 5, 7, 11, 13, 17, 19, 29, 31, 41, 43, 47, 59, 61, 67, 71, 79, 83, 89, 97, 101, 103, 107, 109, 127, 131, 139, 149, 151, 157, 163, 167, 179, 181, 191, 199, 227, 239, 251, 257, 263, 269, 277, 281, 293, 307, 349, 401, 409, 419, 421, 431, 439, 443, 449, 457, 461 (list; graph; listen)
OFFSET

0,1

EXAMPLE

137 is not in the sequence because 13 U 7 -> 137

797 is not in the sequence because 7 U 97 or 79 U 7 -> 797

CROSSREFS

Cf. A141033.

Sequence in context: A127052 A092570 A133956 this_sequence A004051 A127047 A119615

Adjacent sequences: A141406 A141407 A141408 this_sequence A141410 A141411 A141412

KEYWORD

easy,nonn,base

AUTHOR

Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Aug 04 2008, Aug 28 2008

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.


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