A020945 a(2n+1) = |a(2n) - a(2n-1)|, a(2n) = a(n) + a(n-1).

1, 1, 0, 2, 2, 1, 1, 2, 1, 4, 3, 3, 0, 2, 2, 3, 1, 3, 2, 5, 3, 7, 4, 6, 2, 3, 1, 2, 1, 4, 3, 5, 2, 4, 2, 4, 2, 5, 3, 7, 4, 8, 4, 10, 6, 11, 5, 10, 5, 8, 3, 5, 2, 4, 2, 3, 1, 3, 2, 5, 3, 7, 4, 8, 4, 7, 3, 6, 3, 6, 3, 6, 3, 6, 3, 7, 4, 8, 4, 10, 6, 11, 5, 12, 7, 12, 5, 14, 9, 16, 7, 17, 10, 16

Offset

1,4

Links

Table of n, a(n) for n=1..94.

Crossrefs

Cf. A020947-A020950.

Sequence in context: A333632 A358525 A209332 * A231734 A231735 A016429

Adjacent sequences: A020942 A020943 A020944 * A020946 A020947 A020948

Keyword

nonn

Author

Clark Kimberling

Status

approved