78507

Appears in sequences

• Triangle T, read by rows, where column k of T = column 0 of matrix power T^(k+1) for k>0, with column 0 of T = unsigned column 0 of T^-1 (shifted).at n=38A152400
• Column 2 of triangle A152400.at n=6A152402
• Numbers k that divide sigma(k^2) where sigma is the sum of divisors function (A000203).at n=7A232354
• Number of ascent sequences of length n with exactly eight flat steps.at n=5A242161
• Numbers k satisfying gcd(k^2, sigma(k^2)) > sigma(k), where sigma is the sum-of-divisors function.at n=31A322154
• a(n) = 2*n^3 - 3*n + 1.at n=34A377663