Search: a119333 -id:a119333
|
|
A119334
|
|
Indices of Apery-primes: numbers n such that the concatenation of the first n decimal digits of Apery's constant zeta(3) is prime.
|
|
+10
2
|
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
zeta(3) = 1.2020569031595..., 1202056903--the concatenation of the first 10 decimal digits--is prime, so a(1)=10.
|
|
MATHEMATICA
|
Module[{nn=10000, z}, z=RealDigits[Zeta[3], 10, nn][[1]]; Select[Range[nn], PrimeQ[FromDigits[Take[z, #]]]&]] (* Harvey P. Dale, Aug 28 2019 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more,base
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
Search completed in 0.004 seconds
|