28355

Appears in sequences

• a(n)=12*sum(1<=i<=j<=k<=n,i*j/k).at n=15A088941
• 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), (0, 0, -1), (1, 0, -1), (1, 0, 0)}.at n=10A148386
• G.f.: exp( Sum_{n>=1} (x^n/n) * Product_{d|n} (1 + d*x^n) ).at n=43A205478
• The number of possible values that can be obtained for the Shannon diversity index across all partitions of n.at n=45A383683