162603

Appears in sequences

• Numbers k that divide sigma(k) - sigma(k-1).at n=39A227307
• Numbers k such that sigma(k) = sigma(k-1).at n=31A231546
• a(n) = 2*a(n-2) + a(n-3) + a(n-4) for n>=4, a(n) = binomial(n,3) for n<4.at n=27A240607