|
| |
|
|
A069620
|
|
a(1) = 8; a(2n) = smallest prime that is a right concatenation of a(2n-1) and a number with no insignificant zeros and a(2n+1) = smallest prime ending in ( the least significant digits) a(2n-1). Alternate left and right concatenation yielding primes.
|
|
1
| |
|
|
8, 83, 283, 2833, 32833, 328331, 2328331, 232833127, 3232833127, 323283312749, 14323283312749, 1432328331274927, 281432328331274927, 28143232833127492741, 3628143232833127492741, 36281432328331274927411
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
EXAMPLE
| a(4) = 2833 staring with a(3) =283 and a(5) = 32833 ending in a(4) = 2833.
|
|
|
CROSSREFS
| Cf. A053582, A069605, A069606, A069607, A069608, A069609, A069610, A069611, A069613, A069614, A069615, A069616, A069617, A069618, A069619.
Sequence in context: A163191 A068173 A069635 * A196482 A196715 A179980
Adjacent sequences: A069617 A069618 A069619 * A069621 A069622 A069623
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 27 2002
|
|
|
EXTENSIONS
| More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003
|
| |
|
|
