123168

Appears in sequences

• Triangle, T(n, k) = k^6 - n^6 - 5*(n*k)^2*(n^2 - k^2) + 4*n*k*((n*k)^4 - 1), read by rows.at n=12A123964
• Hyper-Wiener index of a benzenoid consisting of a double-step spiral chain of n hexagons (n >= 2, s = 21; see the Gutman et al. reference).at n=13A193398
• Number of (binary) max-heaps on n elements from the set {0,1} containing exactly six 0's.at n=40A326507