44472

Appears in sequences

• Square array T(k,n) by antidiagonals, where T(k,n) is number of ways of placing n identifiable nonnegative intervals with a total of exactly k starting and/or finishing points.at n=51A059515
• The sequence A059515(3,n). Number of ways of placing n identifiable nonnegative intervals with a total of exactly three starting and/or finishing points.at n=6A059517
• Numbers k such that sigma(k) - phi(k) is a 4th power.at n=35A115918
• Number of base 18 circular n-digit numbers with adjacent digits differing by 9 or less.at n=4A125475
• 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, 0), (-1, 0, 1), (0, 1, 0), (1, 0, -1), (1, 0, 0)}.at n=9A149958
• Number of steps to compute the n-th prime in PRIMEGAME using Kilminster's Fractran program with only nine fractions.at n=12A183133
• Number of (w,x,y,z) with all terms in {1,...,n} and w+x<=2y+2z.at n=15A212563
• Numbers n such that n^2048 + (n+1)^2048 is prime.at n=33A274235
• Number of arrangements on a line of n finite closed intervals (possibly of zero length) with k distinct endpoints (n >= 1, 1 <= k <= 2*n).at n=32A300729
• Sum of the second largest parts in the partitions of n into 6 parts.at n=47A308872
• Place two n-gons with radii 1 and 2 concentrically, forming an annular area between them. Connect all the vertices with line segments that lie entirely within that area. Then a(n) is the number of vertices in that figure.at n=31A337701