73040

Appears in sequences

• Smallest k such that k and k+n have the same prime signature that is different from all previous terms.at n=21A085876
• Q-residue of the triangle p(n,k)=floor((n+1)/(n+k+2)/2), 0<=k<=n, where Q is the triangular array (t(i,j)) given by t(i,j)=1. (See Comments.)at n=10A193654
• Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = 7/5.at n=45A279779