login
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
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
EXAMPLE
11,113,11317,1131749,... etc. are all prime.
CROSSREFS
Sequence in context: A110406 A237454 A375614 * A110798 A350246 A329293
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Aug 02 2005
EXTENSIONS
More terms from Joshua Zucker, May 11 2006
STATUS
approved