319251

Appears in sequences

• Triangle T, read by rows, such that T^2 = SHIFT-UP(T); i.e., the matrix square of T shifts each column of T up 1 row, dropping the main diagonal consisting of the powers of 2: [T^2](n,k) = T(n+1,k) with T(n,n) = 2^n for n>=k>=0.at n=21A118022
• Column 0 of triangle A118022, where the matrix square of A118022 shifts each column up 1 row, dropping the main diagonal of powers of 2.at n=6A118023