646800

Appears in sequences

• Areas of integer Heronian triangles [A068967(n), prime(A068967(n)), A068968(n)].at n=16A068969
• Partial sums of cupolar numbers (1/3)*(n+1)*(5*n^2+7*n+3) (A096000).at n=34A117066
• T(n,k) is the number of connected labeled posets with n elements and rank k: triangle read by rows.at n=25A342501
• Integers y such that there exist two integers 0<x<=y<=z such that psi(x) = psi(y) = psi(z) = x + y + z.at n=20A386901
• Integers z such that there exist two integers 0<x<=y<=z such that psi(x) = psi(y) = psi(z) = x + y + z.at n=18A386933