OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..750
FORMULA
a(n)=r(n)*2^b(n) where b(n) is an integer sequence and r(n) converges to 1.124922752241150441104513529....
MATHEMATICA
NestList[If[SquareFreeQ[2 # + 1], # + 1, 2 # + 1] &, 1, 53] (* Ivan Neretin, Apr 26 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Apr 12 2003
STATUS
approved