211263

Appears in sequences

• Number of lattice paths from (0,0) to (n,n) with steps (0,1), (1,0) and, when on the diagonal, (1,1).at n=9A026671
• a(n) = T(n, floor(n/2)), T given by A026670.at n=18A026676
• a(n) = T(n, floor(n/2)), T given by A026736.at n=19A026742
• a(n) = greatest number in row n of array T given by A026736.at n=19A027214
• Numbers k such that (14*10^(k-1) - 41)/9 is a plateau prime.at n=8A082699
• Expansion of 1/(1-x-x^3*c(x^3)), c(x) the g.f. of A000108.at n=28A165407