OFFSET
1,3
COMMENTS
All values will be either 0, 2, or in A007528.
REFERENCES
Keely Grossnickle, Brian Hollenbeck, Jeana Johnson & Zhihao Sun, Triphos: A World Without Subtraction, Mathematics Magazine, 92:4 (2019), 272-285.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Benjamin Knight, Nov 28 2019
STATUS
approved