Expansion of -x^2*(2 + x - 2*x^2 - x^3 + 2*x^4) / ( (x-1)*(1+x)*(1 + x + x^2)*(x^2 - x + 1)*(x^2 + 4*x - 1)*(x^2 - x - 1) ).
A115605
Expansion of -x^2*(2 + x - 2*x^2 - x^3 + 2*x^4) / ( (x-1)*(1+x)*(1 + x + x^2)*(x^2 - x + 1)*(x^2 + 4*x - 1)*(x^2 - x - 1) ).
Terms
- a(0) =0a(1) =0a(2) =2a(3) =7a(4) =31a(5) =128a(6) =549a(7) =2315a(8) =9826a(9) =41594a(10) =176242a(11) =746496a(12) =3162334a(13) =13395658a(14) =56745250a(15) =240376201a(16) =1018250793a(17) =4313378176a(18) =18271765435a(19) =77400436781a(20) =327873517634
External references
- oeis: A115605