OFFSET

0,3

COMMENTS

Floretion Algebra Multiplication Program, FAMP Code: 4kbasesigcycrokseq[ + .25'j - .25'k + .25j' - .25k' + .5'ii' + .25'ij' + .25'ik' + .25'ji' + .25'ki' + .5e]. See link to "Sequences in Context" for details on the "roktype" used.

LINKS

Colin Barker, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,2,0,0,0,0,0,-1).

FORMULA

For n>=0, a(6n+2)=a(6n+3)=6n+2; a(6n+5)=6n+5; a(6n+6)=-6n-6; a(6n+3)=a(6n+4)=9n+9.

a(n) = 2*a(n-6) - a(n-12) for n>13. - Colin Barker, May 14 2019

PROG

(PARI) -Vec((1 - x - 2*x^2 - 2*x^3 - 9*x^4 - 9*x^5 - 6*x^6 + 6*x^7 - x^8 - x^9 + 2*x^12 - 2*x^13) / ((1 - x)^2*(1 + x)^2*(1 - x + x^2)^2*(1 + x + x^2)^2) + O(x^65)) \\ Colin Barker, May 14 2019

CROSSREFS

KEYWORD

sign

AUTHOR

Creighton Dement, Apr 22 2005

STATUS

approved