206671

Appears in sequences

• Number of ways associated with A088959.at n=37A088111
• a(n) = (7*9^n - 1)/2.at n=5A198964
• a(n) = 3^(n+1) + (3^n-1)/2.at n=10A237930
• Array A read by upward antidiagonals: A(n,k) = ((2*n+1)*9^k-1)/2, n,k >= 0.at n=41A255044
• a(n) = n+1 for n <= 2; otherwise a(n) = 3*a(n-3)+1.at n=32A329774