1,1
C. Kimberling, Problem 10520 in Amer. Math. Mon. 103 (1996) p. 347.
Sequence in context: A105600 A072174 A188555 * A020750 A020713 A090990
Adjacent sequences: A020955 A020956 A020957 * A020959 A020960 A020961
nonn
Clark Kimberling (ck6(AT)evansville.edu)