Hello SeqFans,
(last post of the week)
--> the leftmost digit of a(n)
concatenated to
the leftmost digit of a(n+1)
represents [a(n)-a(n-1)]
D=1,12,24,48,97,188,199,211,...
If blocked at some point,
try another way, like:
D=1,12,24,48,97,188,200,222,...
What is the a(1) leading to the
maximum possible length of D?
(I guess all D's stop)
Best,
É.