1,2

The sequence is infinite

Table of n, a(n) for n=1..72.

6*2=12 5+7=12, 2=r(1) so a(1)=1 6*3=18 5+13=18, 7+11=18, 3=r(2) so a(2)=2 6*5=30 7+23=30, 11+19=30, 13+17=30, 5=r(3) so a(3)=3

Sequence in context: A209643 A039123 A131618 * A039257 A039198 A249299

Adjacent sequences: A144108 A144109 A144110 * A144112 A144113 A144114

nonn

Pierre CAMI, Sep 11 2008

approved