OFFSET
1,1
COMMENTS
The "natural" order a(n)=13*n is attained for n = 3..12, n = 15..16, n = 21..22,
n=25..28, n=31..36, n=39..40, n=43..46 etc.
See A158814 for a survey of other multiples in the EKG sequence.
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul Curtz, Mar 22 2009
EXTENSIONS
Edited and extended by R. J. Mathar, Sep 06 2009
STATUS
approved