56571

Appears in sequences

• Nonnegative walks of length n on the x-axis starting at the origin using steps {1,-1} and visiting no point more than twice.at n=33A212584
• Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 10 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=5*floor(n/2), read by rows.at n=39A238586
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 158", based on the 5-celled von Neumann neighborhood.at n=16A279475