620014

Appears in sequences

• a(n) = ((2n+1)*3^n - 1)/2.at n=9A079272
• Number of ways associated with A088959.at n=42A088111
• a(n) = 3^(n+1) + (3^n-1)/2.at n=11A237930
• a(n) = n+1 for n <= 2; otherwise a(n) = 3*a(n-3)+1.at n=35A329774