OFFSET
1,1
COMMENTS
a(21) > pi(2*10^12). [From Donovan Johnson, May 08 2010]
EXAMPLE
94th prime, 491, contains 49 = the string reversal of its index;
281st prime, 1823, contains 182 = the string reversal of its index;
7144652nd prime, 125644177, contains 2564417 = the string reversal of its index; etc.
MATHEMATICA
fQ[n_] := StringPosition[ ToString[ Prime[n]], StringReverse[ ToString[n]]] != {}; Do[ If[ fQ[n], Print[n]], {n, 107350907, 2 10^9}] (* Robert G. Wilson v, Jun 28 2005 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Zak Seidov, Jun 25 2005
EXTENSIONS
a(14)-a(16) from Robert G. Wilson v, Jun 28 2005
a(17)-a(20) from Donovan Johnson, May 08 2010
STATUS
approved