55749

Appears in sequences

• a(n) = a(n-1) - 9*a(n-2), a(0) = 1, a(1) = 3.at n=10A133665
• Number of n X 2 binary arrays indicating whether each 2 X 2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1) X 3 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=20A227252
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 902", based on the 5-celled von Neumann neighborhood.at n=15A284357
• Expansion of 2*(1 - x)/(3 - theta_3(x)), where theta_3() is the Jacobi theta function.at n=37A303909