240368domain: NAppears in sequencesa(n) = 2^n*P_n(4), 2^n times the Legendre polynomial of order n at 4.at n=5A098269A scaled Legendre triangle.at n=49A110124Central coefficients of a scaled Legendre triangle.at n=9A110130Meandric numbers for a river crossing up to 12 parallel roads at n points.at n=14A209656