19630

Appears in sequences

• a(n) = (n - 1)*(n^2 + n - 1).at n=27A033445
• a(n) = A064835(n)/2.at n=20A064836
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 0), (0, -1, 0), (0, 0, 1), (1, 1, 0)}.at n=8A150228
• Numerator of Euler(n, 1/27).at n=4A157091
• Number of nondecreasing arrangements of n+2 numbers in 0..7 with each number being the sum mod 8 of two others.at n=8A183910
• G.f. A(x) satisfies: A(x)^3 = A( x^3/(1-3*x) ), with A(0) = 0.at n=11A264228
• Number of regular graphs on n unlabeled nodes with half-edges.at n=10A333162