123240

Appears in sequences

• a(n) = T(n,n-6), array T as in A055807.at n=20A055811
• a(n) = 1521*n^2 + 39.at n=9A158768
• Integer areas of integer-sided triangles where at least one of the three altitudes is of prime length.at n=37A256579
• a(n) = largest k such that A049820(k) <= A262509(n).at n=32A263083
• a(n) = largest k such that A049820(k) <= A262509(n).at n=33A263083