364476

Appears in sequences

• Number of involutions of length 2n+1 which are invariant under the reverse-complement map and have no decreasing subsequences of length 7.at n=10A145868
• G.f. A(x) satisfies: 1 = ...(((((A(x) - x) - x^2)^(1/2) - x^3)^(1/3) - x^4)^(1/4) - x^5)^(1/5) -...- x^n)^(1/n) -..., an infinite series of nested n-th roots.at n=10A275753