OFFSET
1,2
COMMENTS
W. Edwin Clark computed the first entries.
FORMULA
a(n) = 2^(n*(n+1)/2) - A086899(n).
CROSSREFS
KEYWORD
nonn
AUTHOR
Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 19 2003
EXTENSIONS
a(6) and a(7) from Giovanni Resta, May 08 2006
STATUS
approved