A167687 a(n)=A167683(n)-A167686(n).

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

Offset

0,4

Links

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

Crossrefs

Sequence in context: A086013 A379643 A340671 * A064692 A286106 A079677

Adjacent sequences: A167684 A167685 A167686 * A167688 A167689 A167690

Keyword

sign

Author

Paul Barry, Nov 09 2009

Status

approved