1,2
C. Kimberling, Problem 10520 in Amer. Math. Mon. 103 (1996) p. 347.
Sequence in context: A104309 A033035 A047390 this_sequence A057640 A037030 A075782
Adjacent sequences: A020956 A020957 A020958 this_sequence A020960 A020961 A020962
nonn
Clark Kimberling (ck6(AT)evansville.edu)
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