67844

Appears in sequences

• Square array of coefficients in the successive iterations of x*C(x) = (1-sqrt(1-4*x))/2 where C(x) is the g.f. of the Catalan numbers (A000108); read by antidiagonals.at n=61A158825
• The 5th iteration of x*C(x) where C(x) is the Catalan function (A000108).at n=6A158828