

A097644


Numbers n such that pi(n)=reversal(n).


0




OFFSET

1,1


COMMENTS

This sequence has only two odd terms, i.e. 51 and 8201 and 10 divides all other terms. Next term is greater than 10^8.


LINKS

Table of n, a(n) for n=1..9.


EXAMPLE

26113610 is in the sequence because
pi(26113610)=1631162=reversal(26113610).


MATHEMATICA

Do[If[PrimePi[m]==FromDigits[Reverse[IntegerDigits[m]]], Print[m]], {m, 100000000}]


CROSSREFS

Cf. A037171, A069215.
Sequence in context: A063314 A129298 A065010 * A044302 A044683 A044383
Adjacent sequences: A097641 A097642 A097643 * A097645 A097646 A097647


KEYWORD

base,nonn


AUTHOR

Farideh Firoozbakht, Aug 25 2004


EXTENSIONS

Two more terms from Giovanni Resta, Feb 06 2006


STATUS

approved



