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A101680
A modular binomial transform of 10^n.
0
1, 11, 111, 1011, 10111, 111011, 1100111, 10001011, 100010111, 1100111011, 11101100111, 101110001011, 1011000010111, 11100000111011, 110000001100111, 1000000010001011, 10000000100010111, 110000001100111011
OFFSET
0,2
COMMENTS
A099902 in binary. Bisection of A101623.
FORMULA
a(n)=sum{k=0..n, mod(binomial(2n-k, k), 2)10^k}
CROSSREFS
Sequence in context: A284400 A284541 A267051 * A267356 A215559 A346231
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Dec 11 2004
STATUS
approved