217678233

Appears in sequences

• Expansion of 3*(1+2*x-2*x^2)/((1-x)*(1-6*x^2)).at n=20A026551
• a(n) = 3*(6^n - 1)/5.at n=10A125682
• a(n) = floor(A026532(n)/5).at n=23A329114