49928

Appears in sequences

• Number of rectangles in a pyramid built with squares. The squares counted in A092498 are excluded.at n=22A134507
• 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), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.at n=10A149233
• Members of A143610 for which both neighbors are squarefree.at n=19A166987
• T(n,k)=Number of nXk binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order.at n=38A181274
• Number of 3 X n binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order.at n=6A181279
• Numbers n (other than powers of 2) such that abs(abundance(n)) is an odd square.at n=3A188484
• Langton's ant on a three-dimensional grid: iterations where the ant passes through the origin.at n=12A308563
• Triangle read by rows: T(m,n) (m >= n >= 1) = number of edges formed by drawing the line segments connecting any two of the (m+1) X (n+1) lattice points in an m X n grid of squares and extending them to the boundary of the grid.at n=19A333283
• Row sums of triangle A360173.at n=15A360229
• G.f. A(x) satisfies A(x) = 1/( 1 - 4*x*(1 + x)*A(x) )^(1/2).at n=6A372086