1,1
C. Kimberling, Problem 10520 in Amer. Math. Mon. 103 (1996) p. 347.
Sequence in context: A184745 A113689 A190707 * A076522 A094111 A181021
Adjacent sequences: A020957 A020958 A020959 * A020961 A020962 A020963
nonn
Clark Kimberling (ck6(AT)evansville.edu)