OFFSET
1,1
COMMENTS
Among the first 10^8 terms, the last positive value occurs at n=28823742. - Lars Blomberg, Aug 10 2019
LINKS
Jean-Marc Falcoz, Table of n, a(n) for n = 1..42917
Lars Blomberg, Graph of 10^8 terms
Lars Blomberg, Graph of accumulated sums of 10^8 terms
EXAMPLE
The sequence begins with 2,4,8,16,17,11,10,17,...
As a(1) = 2 (even), we have a(2) = a(1) + [the 1st digit of the seq] = 2 + 2 = 4;
as a(2) = 4 (even), we have a(3) = a(2) + [the 2nd digit of the seq] = 4 + 4 = 8;
as a(3) = 8 (even), we have a(4) = a(3) + [the 3rd digit of the seq] = 8 + 8 = 16;
as a(4) = 16 (even), we have a(5) = a(4) + [the 4th digit of the seq] = 16 + 1 = 17;
as a(5) = 17 (odd), we have a(6) = a(5) - [the 5th digit of the seq] = 17 - 6 = 11;
as a(6) = 11 (odd), we have a(7) = a(6) - [the 6th digit of the seq] = 11 - 1 = 10;
etc.
CROSSREFS
KEYWORD
sign,base
AUTHOR
Eric Angelini and Jean-Marc Falcoz, Aug 06 2019
STATUS
approved