1118931904

Appears in sequences

• a(n) = 6*a(n-1) - 2*a(n-2) for n>1; a(1)=1, a(2)=6.at n=12A154244
• Expansion of x*(1+5*x-2*x^3)/(1-6*x^2+2*x^4).at n=24A249221