OFFSET
0,3
COMMENTS
Floretion Algebra Multiplication Program, FAMP Code: minseq[A*B] with A = + .25'i + .25i' + .25'ii' + .25'jj' + .25'kk' + .25'jk' + .25'kj' + .25e and B = + 'i + 'j - 2'k (apart from initial term and signs)
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,5,0,-4).
FORMULA
a(n) = 5*a(n-2) - 4*a(n-4); a(n) = (5*2^n+(-2)^n-8*(-1)^n-4)/12; g.f. (1+x-2*x^2+2*x^3)/((x-1)*(2*x+1)*(2*x-1)*(x+1))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Creighton Dement, Aug 30 2007
STATUS
approved