23845

Appears in sequences

• a(n) = a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 2.at n=41A050031
• Trajectory of 290 under the Reverse and Add! operation carried out in base 4, written in base 10.at n=5A075299
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.at n=9A148974
• Number of n X 3 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.at n=13A266423
• 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 587", based on the 5-celled von Neumann neighborhood.at n=15A283142
• Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of vertices in the resulting planar graph.at n=11A366483
• The smallest term in A061862 with exactly n distinct partitions into a sum of nonnegative powers of its digits.at n=8A388297