

A104681


Expansion of (1x2*x^22*x^39*x^49*x^56*x^6+6*x^7x^8x^92*x^13+2*x^12) / (x^121+2*x^6).


1



1, 1, 2, 2, 9, 9, 4, 4, 5, 5, 18, 18, 7, 7, 8, 8, 27, 27, 10, 10, 11, 11, 36, 36, 13, 13, 14, 14, 45, 45, 16, 16, 17, 17, 54, 54, 19, 19, 20, 20, 63, 63, 22, 22, 23, 23, 72, 72, 25, 25, 26, 26, 81, 81, 28, 28, 29, 29, 90, 90, 31, 31, 32, 32, 99, 99, 34, 34, 35, 35, 108, 108, 37, 37, 38, 38, 117, 117, 40, 40, 41, 41, 126
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OFFSET

0,3


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)=6n6; a(6n+3)=a(6n+4)=9n+9.
a(n) = 2*a(n6)  a(n12) for n>13.  Colin Barker, May 14 2019


PROG

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.
(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

Sequence in context: A198423 A229116 A203904 * A056856 A133920 A229594
Adjacent sequences: A104678 A104679 A104680 * A104682 A104683 A104684


KEYWORD

sign


AUTHOR

Creighton Dement, Apr 22 2005


STATUS

approved



