OFFSET
0,3
COMMENTS
From the 54th term the sequence goes into a cycle of 117 terms.
For n > 1, a(n) is of the form 2^(k+2) * 5 * r, where k is a nonnegative integer and r is a positive integer relatively prime to 10. Therefore, for n > 1, a(n) is a Zumkeller number (A083207). - Ivan N. Ianakiev, Mar 19 2020
CROSSREFS
KEYWORD
base,easy,nice,nonn
AUTHOR
STATUS
approved