
OFFSET

1,1


COMMENTS

If p(m) = (1/101)*(25*10^(4m1)53) is prime then p(m) is a term of the sequence. a(1) = p(1) and p(2669) is the second term of this form, which is a 10675digit prime. This implies a(3) exists and a(3) <= 10^10675. a(3) is greater than 10^9.


LINKS



MATHEMATICA

Do[If[FromDigits[Reverse[IntegerDigits[n]]]==DivisorSigma[1, n]+2n, Print[n]], {n, 27000000}]


CROSSREFS



KEYWORD

nonn,base,bref,more


AUTHOR



STATUS

approved

