1638401

Appears in sequences

• Triangle read by rows: T(n, k) = 2^n*(q^k - 1)*(q^(n - k) - 1) + 1, where q = 3.at n=40A176794
• Number of n X 6 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors not equal to itself.at n=20A265989