5461682688

Appears in sequences

• Triangle, read by rows: T(n,k) = (1/2)*Sum_{j=0..2^n-1} j^k for k=0..n-1, n>=1; related to the Prouhet-Tarry-Escott problem.at n=20A140047
• a(n) = (1/2)*Sum_{j=0..2^n-1} j^(n-1) for n>=1.at n=5A140048