1,2

a(2) = #{2, 3/2+1/2, 1+1, 1+1/2+1/2, 1/2+1/2+1/2+1/2} = 5.

Cf. A154887, A119983, A143270.

Sequence in context: A106415 A088320 A041040 this_sequence A145162 A095839 A107669

Adjacent sequences: A154883 A154884 A154885 this_sequence A154887 A154888 A154889

more,nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 17 2009