0,2

For n=0..4, there is 1 root. For n=5..10, there are 5 roots. For n=11..17, there are 9 roots. etc... So first ranks are 0,5,11,18, ...

A004083 (except first term)

Sequence in context: A059960 A118122 A166039 this_sequence A004083 A056000 A080566

Adjacent sequences: A145002 A145003 A145004 this_sequence A145006 A145007 A145008

nonn

Sebastien Dumortier (sdumortier(AT)ac-limoges.fr), Sep 28 2008