OFFSET
1,3
LINKS
Jason Kimberley, Table of n, a(n) for n = 1..170
PROG
(Magma) use code in A152871.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vladimir Shevelev, Dec 14 2008
EXTENSIONS
Renamed and extended by Jason Kimberley, Feb 12 2013
STATUS
approved