A101650 A Thue-Morse-Stern sequence.

0, 0, 1, 0, 2, 1, 2, 0, 0, 2, 1, 1, 1, 2, 0, 0, 1, 0, 0, 2, 1, 1, 0, 1, 0, 1, 1, 2, 0, 0, 1, 0, 2, 1, 2, 0, 1, 0, 0, 2, 1, 1, 0, 1, 2, 0, 2, 1, 2, 0, 2, 1, 0, 1, 1, 2, 0, 0, 1, 0, 2, 1, 2, 0, 0, 2, 1, 1, 1, 2, 0, 0, 2, 1, 2, 0, 1, 0, 0, 2, 1, 1, 0, 1, 2, 0, 2, 1, 1, 2, 0, 0, 0, 2, 1, 1, 1, 2, 0, 0, 0

Offset

0,5

Comments

a(2n+1) = a(n).

Links

Table of n, a(n) for n=0..100.

Formula

a(n)=mod(-1+sum{k=0..floor(n/2), mod(binomial(n-k, k), 2)}, 3); a(n)=mod(-1+A002487(n+1), 3).

Crossrefs

Cf. A010060.

Sequence in context: A348920 A348921 A050601 * A287411 A053796 A029391

Adjacent sequences: A101647 A101648 A101649 * A101651 A101652 A101653

Keyword

easy,nonn

Author

Paul Barry, Dec 10 2004

Status

approved