77878

Appears in sequences

• Triangle read by rows: T(n, k) = (6*n-6*k+1)*T(n-1, k-1) + (6*k-5)*T(n-1, k) + 6*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.at n=17A144443
• Triangle read by rows: T(n, k) = (6*n-6*k+1)*T(n-1, k-1) + (6*k-5)*T(n-1, k) + 6*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.at n=18A144443
• Number of n-node rooted trees of height 10.at n=7A245068
• Numbers which have only digits 7 and 8 in base 10.at n=35A256340