OFFSET
1,1
LINKS
Ray Chandler, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = 2*A020890(n).
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Extended and corrected by David W. Wilson
Offset corrected to 1 by Ray Chandler, Jan 23 2020
STATUS
approved