28588

Appears in sequences

• 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, 0), (-1, -1, 1), (-1, 0, 1), (-1, 1, -1), (1, 0, 0)}.at n=12A148013
• Wiener index of the n-web graph.at n=27A180576
• Number of partitions of n whose minimal excluded multiplicity is even.at n=42A299408
• a(n) = Sum_{1 <= i, j, k <= n} gcd(i,j,k).at n=27A344522
• Expansion of e.g.f. 1/(1 + log(1-x))^x.at n=7A351739