OFFSET
1,1
COMMENTS
No term occurs more than twice. Conjecture: the difference sequence, (13,3,5,13,13,3,5,...) has only 4 distinct terms: 3,5,10,13.
EXAMPLE
10 is in rows 1 and 4; 23 is in rows 2 and 9; 26 is in rows 1 and 10.
MATHEMATICA
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Feb 09 2021
STATUS
approved