86054

Appears in sequences

• Reversion of Pell numbers A000129(n+1).at n=15A104565
• Number of reduced words of length n in the Weyl group A_9.at n=14A161457
• Number of reduced words of length n in the Weyl group A_9.at n=31A161457
• G.f. A(x) satisfies: A(x)^2 + A(-x)^2 = 2 and A(x)^-2 - A(-x)^-2 = -8*x.at n=8A193618
• G.f.: sqrt( (1 + sqrt(1+8*x)) / (1 + sqrt(1-8*x)) ).at n=8A246062