|
| |
|
|
A102545
|
|
Numbers n such that n999999 is prime.
|
|
0
| |
|
|
2, 4, 16, 19, 20, 23, 29, 40, 43, 50, 59, 62, 71, 83, 89, 107, 115, 116, 122, 134, 145, 155, 157, 160, 167, 184, 197, 218, 250, 251, 262, 268, 278, 284, 289, 292, 298, 311, 314, 335, 344, 346, 347, 349, 353, 355, 361, 362, 379, 389, 398, 400, 401, 425, 431, 437, 439, 452, 457, 470, 475, 485, 491
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
EXAMPLE
| If n=2, then n999999 = 2999999 (prime).
If n=43, then n999999 = 43999999 (prime).
If n=89, then n999999 = 89999999 (prime).
|
|
|
PROG
| (MAGMA) [ n: n in [1..700] | IsPrime(Seqint([9, 9, 9, 9, 9, 9] cat Intseq(n))) ]; // from Vincenzo Librandi, Feb 04 2011
|
|
|
CROSSREFS
| Sequence in context: A186108 A131560 A067709 * A045521 A076434 A192150
Adjacent sequences: A102542 A102543 A102544 * A102546 A102547 A102548
|
|
|
KEYWORD
| base,nonn
|
|
|
AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Feb 24 2005
|
| |
|
|
