271384

Appears in sequences

• Number of permutations of length n which avoid the patterns 2134, 3214, 4312.at n=12A116745
• Number of (n+1) X (2+1) 0..3 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock.at n=7A235887
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2X2 subblock.at n=37A235893
• Expansion of (A(x)^2-A(x^2))/2 where A(x) = A001006(x).at n=14A275208