A085017 Reverse(Prime(n)) concatenated with Prime(n) (a palindrome) is divisible by n.

1, 11, 189211, 219131, 3912073, 251088329, 4281405931, 5613526973

Offset

0,2

Links

Table of n, a(n) for n=0..7.

Example

189211 is in the sequence since the 189211st prime is 2590087 and 78009522590087 is divisible by 189211

Mathematica

i=IntegerDigits; c[x_] := FromDigits[Flatten[{Reverse[i[x]], i[x]}]]; Do[If[Mod[c[Prime[n]], n]==0, Print[n]], {n, 10^6}]

Crossrefs

Cf. A085016.

Sequence in context: A201249 A144837 A324267 * A239203 A098880 A076173

Adjacent sequences: A085014 A085015 A085016 * A085018 A085019 A085020

Keyword

base,nonn

Author

Giovanni Resta, Jun 18 2003

Status

approved