

A105323


Numbers of the form 41*(2*10^n+1) where (2*10^n+1)/3 is prime (n is in the sequence A096507).


3




OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

861 is in the sequence because 861=41*(2*10^1+1); (2*10^1+1)/3=7 and 7 is prime.


MATHEMATICA

Do[If[PrimeQ[(2*10^n + 1)/3], Print[41*(2*10^n + 1)]], {n, 63}]


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



