1444724736

Appears in sequences

• Coordination sequence for diamond structure D^+_12. (Edges defined by l_1 norm = 1.)at n=17A035882
• a(n) = 2^n * (2*n)! / (n!)^2.at n=11A059304
• Number of rooted unicursal planar maps with n edges and exactly one vertex of valency 1 (unicursal means that exactly two vertices are of odd valency; there is an Eulerian path).at n=11A069722
• E.g.f. BesselI(0,2*sqrt(2)*x) + BesselI(1,2*sqrt(2)*x)/sqrt(2).at n=22A098660
• Expansion of (sqrt(1-8*x^2)+8*x^2+2*x-1)/(2*x*sqrt(1-8*x^2)).at n=22A103973