11182080

Appears in sequences

• Expansion of e.g.f. cosh(log(1+tanh(x))).at n=13A009126
• E.g.f.: x^3*exp(x)^2.at n=15A052771
• Number of walks of length n along the edges of an octahedron starting and ending at a vertex and also ( with a(0)=0 ) between two opposite vertices.at n=13A054881
• a(n) = Sum_{k=floor((n+1)/2)..n} J(k+1), J(k) = A001045(k).at n=23A129362
• a(n) = n*A004141(n).at n=9A259868