2391480

Appears in sequences

• Expansion of 3*x*(3*x+1)*(2*x-1) / ( (1+x)*(3*x^2+1) ).at n=25A143769
• A145312(n)/1440.at n=25A145346
• a(n) = 9*(3^n - 1)/2.at n=12A168569