

A110434


Distinct numbers with least significant digit following the repetitive pattern 1,3,7,9,1,3,7,9,... such that every partial concatenation is a prime.


0



11, 3, 17, 49, 51, 93, 87, 269, 151, 183, 167, 79, 371, 273, 217, 329, 31, 443, 187, 1049, 271, 213, 587, 969, 181, 873, 1187, 429, 411, 253, 557, 99, 1351, 323, 3627, 469, 2951, 813, 697, 459, 2061, 603, 77, 489, 1251, 1443, 297, 2079, 561, 753, 507, 1959, 1041
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OFFSET

1,1


COMMENTS

Conjecture: every number == 1,3,7,9 (mod 10) is a term.
Pseudoprimality, but not primality, checked for some of the larger numbers involved here.  Joshua Zucker, May 11 2006


LINKS

Table of n, a(n) for n=1..53.


EXAMPLE

11,113,11317,1131749,... etc. are all prime.


CROSSREFS

Sequence in context: A088262 A110406 A237454 * A110798 A088653 A317311
Adjacent sequences: A110431 A110432 A110433 * A110435 A110436 A110437


KEYWORD

base,nonn


AUTHOR

Amarnath Murthy, Aug 02 2005


EXTENSIONS

More terms from Joshua Zucker, May 11 2006


STATUS

approved



