OFFSET
1,13
COMMENTS
LINKS
R. Zumkeller, Table of n, a(n) for n = 1..10000
EXAMPLE
A100949(21) = #{7+2*7, 11+2*5, 17+2*2} = 3,
a(21) = #{11+2*5} = 1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 23 2004
STATUS
approved