1,2

R. K. Guy, Unsolved Problems in Number Theory, E20.

R. G. Stanton and P. H. Dirksen, Davenport-Schinzel sequences, Ars. Combin., 1 (1976), 43-51.

Adjacent sequences: A005002 A005003 A005004 this_sequence A005006 A005007 A005008

Sequence in context: A008333 A076295 A083030 this_sequence A074148 A132297 A007333

nonn,nice

njas