2615088300
domain: N
Appears in sequences
- Number of closed walks of length n along the edges of a tetrahedron based at a vertex.at n=21A054878
- a(n) = 3*(9^n - 1)/4.at n=10A054880
- Partial sums of A080925.at n=20A080926
- Numbers n such that A081249(m)/m^2 has a local maximum for m = n.at n=19A081251
- a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), starting with 1, 2, 6, 20.at n=20A132353
- a(n) = a(n-1) + 9*a(n-2) - 9*a(n-3), where a(0) = 1, a(1) = 3, a(2) = 6, a(3) = 33.at n=20A297444