OFFSET
0,3
COMMENTS
Floretion Algebra Multiplication Program, FAMP Code: 2tessumseq[.25'i + .25i' + .5'ij' + .5'ji' + .25'jk' + .25'kj']; sumtype: (Y[15], *, sum)
LINKS
Colin Barker, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (1,0,-1,2,-1,0,1,-1).
FORMULA
a(n) = a(n-1) - a(n-3) + 2*a(n-4) - a(n-5) + a(n-7) - a(n-8) for n>7. - Colin Barker, May 15 2019
PROG
(PARI) concat(0, Vec(x*(1 + 4*x + 5*x^2 - x^3 + 6*x^4 + x^5 - 4*x^6) / ((1 - x)^2*(1 + x)^2*(1 - x + x^2)*(1 + x^2)) + O(x^40))) \\ Colin Barker, May 15 2019
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Creighton Dement, Aug 22 2005
STATUS
approved