|
Search: id:A108830
|
|
|
| A108830 |
|
Primes such that the outer 2 digits are n and n-1 and all inner digits are 2, where 0 < n < 9. |
|
+0
1
|
|
| 827, 2221, 42223, 4222222223, 42222222223, 222222222222222221, 822222222222222222227, 42222222222222222222222222222223, 8222222222222222222222222222222227
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
PROGRAM
|
(PARI) n10np1(n, d) = { local(x, y, k); for(x=1, n, for(k=1, 8, y=10^(x+1)*k+floor(10^x*d/9)*10+k-1; if(isprime(y), print1(y", ")) ) ) }
|
|
CROSSREFS
|
Sequence in context: A143799 A046496 A102350 this_sequence A134726 A104281 A099052
Adjacent sequences: A108827 A108828 A108829 this_sequence A108831 A108832 A108833
|
|
KEYWORD
|
easy,nonn,base
|
|
AUTHOR
|
Cino Hilliard (hillcino368(AT)gmail.com), Jul 11 2005
|
|
|
Search completed in 0.002 seconds
|
