|
Search: id:A103899
|
|
|
| A103899 |
|
Concatenation of next a(n) odd numbers is prime. |
|
+0
1
|
| |
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
a(1)=2 because 13 is prime
|
|
MATHEMATICA
|
c = 1; Do[p = c; k = 1; While[ !PrimeQ[p], c += 2; p = p*10^Length[IntegerDigits[c]] + c; k++ ]; Print[k]; c += 2, {n, 1, 30}] (Propper)
|
|
CROSSREFS
|
Sequence in context: A117008 A126127 A102578 this_sequence A093324 A034798 A115236
Adjacent sequences: A103896 A103897 A103898 this_sequence A103900 A103901 A103902
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
Zak Seidov (zakseidov(AT)yahoo.com), Mar 30 2005
|
|
EXTENSIONS
|
4 more terms from Ryan Propper (rpropper(AT)stanford.edu), Aug 10 2005
|
|
|
Search completed in 0.002 seconds
|
