OFFSET
0,3
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..1000
EXAMPLE
a(12) = #{12, 9+3, 8+4, 7+5, 6+6, 6+3+3, 5+4+3, 4+4+4, 3+3+3+3} = 9;
a(13) = #{13, 10+3, 9+4, 8+5, 7+6, 7+3+3, 6+4+3, 5+5+3, 5+4+4, 4+3+3+3} = 10;
a(14) = #{14, 11+3, 10+4, 9+5, 8+6, 8+3+3, 7+7, 7+4+3, 6+5+3, 6+4+4, 5+5+4, 5+3+3+3, 4+4+3+3} = 13;
a(15) = #{15, 12+3, 11+4, 10+5, 9+6, 9+3+3, 8+7, 8+4+3, 7+5+3, 7+4+4, 6+6+3, 6+5+4, 6+3+3+3, 5+5+5, 5+4+3+3, 4+4+4+3, 3+3+3+3+3} = 15;
a(16) = #{16, 12+4, 11+5, 10+6, 9+7, 8+8, 8+4+4, 7+5+4, 6+6+4, 6+5+5, 4+4+4+4} = 11.
PROG
(Haskell)
a209038 n = p (max 1 (n `div` 4)) n where
p _ 0 = 1
p k m = if m < k then 0 else p k (m - k) + p (k + 1) m
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 04 2012
STATUS
approved