1048598

Appears in sequences

• a(n) = Sum_{i=0..n} Sum_{j=0..i} T(i,j), T given by A026584.at n=15A026598
• a(n) = 1 + 2^(n-1) + n for n > 0, a(0) = 2.at n=21A052968
• Positions of 0 in A288381; complement of A288383.at n=22A288382