119041

Appears in sequences

• Diagonals of Pascal's triangle mod 2 interpreted as binary numbers.at n=32A006921
• Take an n X n square grid of points in the plane; a(n) = number of ways to divide the points into two sets using a straight line.at n=24A114043
• A bisection of A006921.at n=16A260022
• G.f. A(x) satisfies: 1 = Sum_{n>=0} x^n * ((1 + 4*x)^n - A(x))^(n+1), where A(0) = 0.at n=6A325584
• E.g.f. satisfies A(x) = exp( x * exp(x) * A(x)^3 ).at n=5A362656