80255

Appears in sequences

• a(n) = least number not of form [ (a^2+b^2)/n ].at n=41A036574
• Number of nonempty subsets of {1, 2, ..., n} having pairwise coprime elements.at n=33A187106
• Expansion of 1/(1 - 2*x - 3*x^2 - 4*x^3 + 4*x^4).at n=10A375273