96633

Appears in sequences

• Triangle read by rows: T(n,k) is the number of sequences of length n on the alphabet {0,1,2,3}, containing k subsequences 00 (0<=k<=n-1).at n=48A128235
• Numbers k such that k and k^2 use only the digits 3, 6, 7, 8 and 9.at n=21A137137
• T(n, k) = Sum_{j=k..n} binomial(n, j)*E2(j, j-k), where E2 are the Eulerian numbers A201637. Triangle read by rows, T(n, k) for 0 <= k <= n.at n=31A343804