129585

Appears in sequences

• a(n) = 225*n^2 - 15.at n=23A158559
• a(n) = a(n-1) + 3*a(n-2) - 2*a(n-3) - 2*a(n-4), where a(0) = 1, a(1) = 2, a(2) = 3, a(3) = 4.at n=26A295619