267846264

Appears in sequences

• a(n) = 9^n * n*(n+1).at n=7A116176
• a(n) = (n/4)*3^(n/2)*((1+sqrt(3))^2+(-1)^n*(1-sqrt(3))^2).at n=28A187273
• Expansion of (1+3*x)^2/(1-3*x)^2.at n=14A236967
• Number of solutions to gcd(u^2 + v^2 + w^2 + x^2 + y^2 + z^2, n) = 1 with u, v, w, x, y, z in [0,n-1].at n=26A238534
• Numbers of multiplicative persistence 5 which are themselves the product of digits of a number.at n=24A350184