0,4
Table of n, a(n) for n=0..19.
Sequence in context: A026650 A009253 A251593 * A013320 A056308 A081077
Adjacent sequences: A012837 A012838 A012839 * A012841 A012842 A012843
nonn
Patrick Demichel (patrick.demichel(AT)hp.com)
approved