53948

Appears in sequences

• Number of distinct values taken by 2^2^...^2 (with n 2's and parentheses inserted in all possible ways).at n=16A002845
• 1/8 the number of (n+1)X4 0..3 arrays with all 2X2 subblock sums the same.at n=6A184023
• 1/8 the number of (n+1)X8 0..3 arrays with all 2X2 subblock sums the same.at n=2A184027
• T(n,k)=1/8 the number of (n+1)X(k+1) 0..3 arrays with all 2X2 subblock sums the same.at n=38A184029