OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..4000
FORMULA
a(n) = Min{x; A084311(x)=n}.
EXAMPLE
In A084311, n=4 arises first at the 13th position, so a(4)=13.
MATHEMATICA
f[x_] := GCD[Prime[x]-1, x-1] t=Table[0, {256}]; Do[s=f[n]; If[s<257&&t[[s]]==0, t[[s]]=n], {n, 1, 100000}]; t
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 13 2003
STATUS
approved