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A109293
Numbers n such that the string n23572357 is prime.
0
31, 36, 42, 78, 90, 97, 102, 109, 139, 141, 150, 177, 189, 193, 198, 205, 207, 210, 213, 223, 232, 234, 265, 267, 286, 304, 318, 325, 328, 330, 331, 343, 354, 358, 382, 384, 399, 402, 403, 406, 414, 415, 435, 442, 447, 451, 454, 477, 483, 493, 501, 504, 508, 513, 517, 520, 525, 532, 552
OFFSET
1,1
EXAMPLE
n=4 is not in the sequence because n23572357 = 423572357 = 13*17*1916617 is composite.
CROSSREFS
Sequence in context: A299455 A225138 A300093 * A053684 A336178 A044973
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Aug 20 2005
STATUS
approved