22540

Appears in sequences

• Partial sums of A051865.at n=23A050441
• 5^n reduced modulo 3^n.at n=10A067602
• Number of Garden of Eden partitions of n in Bulgarian Solitaire.at n=41A123975
• Number of nX2 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in increasing order.at n=20A166814
• Number of days after Mar 01 00 such that the date written in the format DD.MM.YY is palindromic.at n=19A210887
• Number of nontrivially compound perfect squared rectangles of order n up to symmetries of the rectangle.at n=17A217153
• Unchanging value maps: number of n X 3 binary arrays indicating the locations of corresponding elements unequal to no king-move neighbor in a random 0..1 n X 3 array.at n=9A219398
• Number of distinct lines passing through 3 or more points in an n X n grid.at n=27A225606
• Number of nondecreasing -3..3 vectors of length n whose dot product with some nonincreasing -3..3 vector equals n.at n=13A226394
• Alternating sum of hexagonal pyramidal numbers.at n=40A266677
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 561", based on the 5-celled von Neumann neighborhood.at n=27A272937
• Triangle T read by rows: T(n, m), for n >= 2, and m=1, 2, ..., n-1, equals the positive integer solution x of y^2 = x^3 - A(n, m)^2*x with the area A(n, m) = A249869(n, m) of the primitive Pythagorean triangle characterized by (n, m) or 0 if no such triangle exists.at n=86A278711
• Expansion of Product_{k>=0} 1/(1 + x^(3*k+2))^(3*k+2).at n=36A285310
• a(n) is the total multiplicity of all products of Schur functions s(lambda)*s(lambda) with lambda a partition of n.at n=11A296625
• Lesser of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=14A323329
• Number of self-avoiding walks on a 2-dimensional square lattice where the walk consists of steps with incrementing length from 1 to n.at n=9A334877
• Number of chiral pairs of polyominoes with n octagonal cells of the hyperbolic regular tiling with Schläfli symbol {8,oo}.at n=3A389938