OFFSET
1,3
COMMENTS
Compare a(65537) = 19681 to A000720(65537) = 6543.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10001
FORMULA
a(1) = 0, and for n > 1, a(n) = A283991(n) + a(n-1).
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 20 2017
STATUS
approved