A176840 Variant of A176546 with the sign of the second term switched.

1, -1, 1, -1, 1, -1, 5, -691, 7, -3617, 43867, -174611, 854513

Offset

0,7

Comments

Essentially the same as A000367. Also the nonzero entries of A027641.

Links

Table of n, a(n) for n=0..12.

Formula

a(n)=A176546(n), n>1.

Crossrefs

Cf. A027641.

Sequence in context: A242193 A326727 A090947 * A000367 A176546 A092133

Adjacent sequences: A176837 A176838 A176839 * A176841 A176842 A176843

Keyword

sign,frac,easy,less

Author

Paul Curtz, Apr 27 2010

Status

approved