OFFSET
0,3
COMMENTS
Floretion Algebra Multiplication Program, FAMP Code: 2tessumseq[ + .5'k + .5i' + .5j' + .5'kk'], sumtype: (Y[15], *, sum)
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,-1,1,0,0,0,0,0,0,0,0,-1,1,-1,1).
FORMULA
G.f.: x*(1 + 4*x - 2*x^3 - 6*x^5 + 8*x^6 - 6*x^7 + 4*x^8 - 6*x^9 + 2*x^11 + x^12 + 2*x^13)/((x - 1)*(x^2 + 1)*(x^4 + 1)*(x^8 - x^4 + 1)).
MATHEMATICA
LinearRecurrence[{1, -1, 1, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, -1, 1}, {0, -1, -5, -4, 2, 1, 1, -6, 0, 3, 3, 0, -2, 1, 5}, 100] (* Jinyuan Wang, Feb 28 2020 *)
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Creighton Dement, Aug 26 2005
STATUS
approved