160797

Appears in sequences

• Odd hexagonal pyramidal numbers.at n=31A015225
• Intersection of A065764 and A065765: n such that x and y exist with sigma[x^2] = n = sigma[2*(y^2)].at n=9A065767
• Expansion of c(x^2-x^3), c(x) the g.f. of A000108.at n=21A115399
• a(n) = sqrt(sigma(2*m^2)), where m = A097023(n), i.e., sigma(2*m^2) is a square.at n=13A163764
• a(n) = 16n^4 + 64n^3 + 104n^2 + 80n + 21.at n=9A176711
• Sum of divisors of the minimal numbers (A007416).at n=49A256259
• Odd numbers m such that sigma(x) = m has more than 1 solution.at n=38A300869
• a(n) is the least positive number that can be written as p^2 + p*q + q^2 in exactly n ways where p and q are primes and p <= q.at n=4A350655