

A158999


Palprimes of the form m*reversal(m)+1, sorted on m.


2




OFFSET

1,1


COMMENTS

There is no further term up to 5*10^17. 1008001 is the only known palprime which has two representations of the form m*reversal(m)+1 (m > reversal(m)).


LINKS

Table of n, a(n) for n=1..6.
Carlos Rivera,P*R(P)+1 = Palprime


MATHEMATICA

r[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Do[If[m>=r[m]&&PrimeQ[m r[m]+1] && r[m r[m]+1]==m r[m]+1, Print[m r[m]+1]], {m, 710000000}]


CROSSREFS

Cf. A158997, A177856.
Sequence in context: A134996 A134998 A078790 * A283300 A069506 A239900
Adjacent sequences: A158996 A158997 A158998 * A159000 A159001 A159002


KEYWORD

base,more,nonn


AUTHOR

Farideh Firoozbakht, Jul 09 2009


EXTENSIONS

Crossreference fixed by Franklin T. AdamsWatters, May 14 2010


STATUS

approved



