OFFSET
0,3
COMMENTS
A101624 in binary.
FORMULA
a(n)=sum{k=0..floor(n/2), mod(binomial(n-k, k), 2)*10^k}.
a(n)=sum{k=0..n, mod(binomial(k, n-k), 2)10^(n-k)};
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Dec 10 2004
STATUS
approved