156888

Appears in sequences

• Generating function A(x) satisfies A(x) = (1+x)^2*A(x^2)^2, with A(0)=1.at n=30A073708
• a(n) = 121*n^2 + 2*n.at n=35A181679
• Number of 6-step left-handed knight's tours (moves only out two, left one) on an n X n board summed over all starting positions.at n=28A187176
• Numbers k such that Bernoulli number B_{k} has denominator 140100870.at n=20A295599