88621

Appears in sequences

• a(n) = n^4/2 - n^3 + 3*n^2/2 - n + 1 = (n^2 + 1)*(n^2 - 2*n + 2)/2.at n=21A058919
• a(n) = n * Sum_{d|n} sigma(d)^3 / d.at n=19A344043
• Centered square numbers which are sphenic numbers.at n=32A380882