5,1
Stanley Selkow, Discr. Math. 185 (1998), 183-191.
Sequence in context: A017723 A058836 A166792 * A083367 A173123 A004353
Adjacent sequences: A013922 A013923 A013924 * A013926 A013927 A013928
nonn
Stanley Selkow (sms(AT)owl.WPI.EDU)