85524

Appears in sequences

• Number of distinct non-extendable sequences X={x(1),x(2),...,x(k)} where x(1)=1, the x(i)'s are distinct elements of {1,...,n} with |x(i)-x(i+1)|=1 or 2, for i=1,2,...,k.at n=18A054668
• Fixed points of permutations A256210 and A256371.at n=25A256372
• E.g.f. satisfies A(x) = 1/(1 + A(x) * log(1 - x*A(x)))^3.at n=4A377493