OFFSET
1,1
COMMENTS
By "significant digit" we mean to exclude from the quotients any zeros preceding the first nonzero digit, as well as zeros following the last nonzero digit (as in a terminating decimal).
Is the sequence infinite?
EXAMPLE
a(1)/a(2) = 2/3 = 0.666... and a(2)/a(1) = 3/2 = 1.5 and their combined distinct significant digits (1,5,6) are exclusive of the combined distinct digits of a(1) and a(2), (2,3).
a(7)/a(8) = 11/40 = 0.275 and a(8)/a(7) = 40/11 = 3.636363... and their combined distinct significant digits (2,3,5,6,7) are exclusive of the combined distinct digits of a(7) and a(8), (0,1,4).
a(106)/a(107) = 624/208 = 3 and a(107)/a(106) = 208/624 = 0.333... and their combined distinct significant digits (3) is exclusive of the combined distinct digits of a(106) and a(107), (0,2,4,6,8).
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Eric Angelini and Hans Havermann, Mar 23 2020
STATUS
approved