OFFSET
1,3
COMMENTS
It is conjectured that there are no other terms.
LINKS
MAPLE
PROG
(PARI) valp(n, p)=my(s); while(n\=p, s+=n); s
is(n)=valp(n, 3)==2*valp(n\2, 3) && valp(n, 5)==2*valp(n\2, 5) && valp(n, 7)==2*valp(n\2, 7) && valp(n, 11)==2*valp(n\2, 11) \\ Charles R Greathouse IV, Feb 02 2016
CROSSREFS
KEYWORD
nonn,bref
AUTHOR
Peter Luschny, Oct 06 2011
STATUS
approved