login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Primes which are digital reversals of products of "emirpimes" pairs.
0

%I #4 May 01 2013 21:06:46

%S 2161,39841,242491,414553,513691,555871,830551,854431,904261,1663951,

%T 1706473,2060803,3201643,5543029,6075379,6497509,6830797,6846787,

%U 7245937,7558297,9300043,9339439,12248779,23175751,23793631,24769057

%N Primes which are digital reversals of products of "emirpimes" pairs.

%F {A004086(A158126(i)) such that A004086(A158126(i)) is an element of A000040}.

%e a(1) = 2161 because this is prime, and R(A158126(2)) = R(1612) = 2161. a(2) = 39841 because this is prime, and R(A158126(20)) = R(148930) = 039841 which in OEIS form strips away leading zero to become 39841. a(7)is the prime 854431 = R(A158126(16)) = R(134458).

%Y Cf. A000040, A001358, A004086, A014613, A083815, A097393, A158126.

%K base,easy,nonn,less

%O 1,1

%A _Jonathan Vos Post_, Apr 06 2009

%E Edited by _N. J. A. Sloane_, Apr 07 2009

%E 414553 inserted by _R. J. Mathar_, Dec 06 2009