1195743

Appears in sequences

• Number of closed walks of length n along the edges of a tetrahedron based at a vertex.at n=14A054878
• Closed walks of length 2n along the edges of a cube based at a vertex.at n=7A054879
• Binomial transform of (1,-1,4,-16,64,-256,1024,...) = (3*0^n-(-4)^n)/4.at n=14A084567
• a(n) = (2 + (-1)^n + 3^n)/4.at n=14A122983
• a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), with initial values 1,3,7,20.at n=13A132868
• Numbers occurring in A137822 : first differences of numbers n such that 3 | sum( Catalan(k), k=1..2n).at n=20A137823
• Array read by antidiagonals: A(n, L) is the number of closed walks of length 2L along the edges of an n-cube based at a vertex, for n >= 1 and L >= 1.at n=38A286899
• A(n, k) = (m*k)! [x^k] MittagLefflerE(m, x)^n, for m = 2, n >= 0, k >= 0; square array read by descending antidiagonals.at n=58A326476