92120

Appears in sequences

• a(n) = 10*a(n-1) - 2*a(n-2), a(0)=0, a(1)=1.at n=6A190869
• G.f. A(x) satisfies A(x) = 1 / (1 - x*A(x) / (1+x))^4.at n=6A371496