1779141

Appears in sequences

• a(n) = 7*a(n-1) - 14*a(n-2) + 7*a(n-3) with a(0)=0, a(1)=1, a(2)=4.at n=12A215493
• Number of minimal total dominating sets in the (2n-1)-triangular snake graph.at n=25A308591