0,1

Pattern is clear upon comparing adjacent terms of the form (n, -n).

Table of n, a(n) for n=0..78.

Index entries for linear recurrences with constant coefficients, signature (-1,0,-1,-1).

Floretion Algebra Multiplication Program, FAMP Code: 1vesseq[ + .25'i + .5'j + .5'k + .25i' - .5j' + .5k' + .25'ii' + .25'jj' + .25'kk' + .5'ij' + .5'ik' + .5'ji' + .25'jk' + .5'ki' + .25'kj' + .25e ]

Sequence in context: A099224 A136598 A193524 * A073231 A099223 A233427

Adjacent sequences: A105074 A105075 A105076 * A105078 A105079 A105080

sign,easy

Creighton Dement, Apr 06 2005

Signs in the generating function corrected by R. J. Mathar, Aug 28 2010

approved