0,4

Number of terms per row in the table of A167224;

a(n) <= A077121(n).

R. Zumkeller, Table of n, a(n) for n = 0..500

a(3) = #{27-4, 27-16, 27-25} = #{23, 11, 2} = 3;

a(4) = #{} = 0;

a(5) = #{125-16, 125-36, 125-64} = #{109, 89, 61} = 3.

Sequence in context: A066851 A288571 A270028 * A261922 A078907 A282135

Adjacent sequences: A167220 A167221 A167222 * A167224 A167225 A167226

nonn

Reinhard Zumkeller, Oct 31 2009

approved