31872

Appears in sequences

• Number of permutations in the symmetric group S_n such that the size of their centralizer is even.at n=8A088335
• Number of paths of length n between two arbitrary, distinct vertices in K6, the complete graph on 6 vertices.at n=11A108508
• a(n) = nonnegative value y such that (A155135(n), y) is a solution to the Diophantine equation x^3+28*x^2 = y^2.at n=33A155137
• a(n) = nonnegative value y such that (A155136(n), y) is a solution to the Diophantine equation x^3+28*x^2 = y^2.at n=32A155138
• Number of unimodal functions [1..n]->[0..2].at n=28A223718
• Number of length n arrays of permutations of 0..n-1 with each element moved by -n to n places and every three consecutive elements having its maximum within 4 of its minimum.at n=13A263696
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 105", based on the 5-celled von Neumann neighborhood.at n=14A278863
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 121", based on the 5-celled von Neumann neighborhood.at n=14A278958
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 363", based on the 5-celled von Neumann neighborhood.at n=14A281417
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 734", based on the 5-celled von Neumann neighborhood.at n=14A290213
• Number of Motzkin meanders of length n with an even number of humps and an odd number of peaks.at n=12A325925
• Triangle read by rows: T(n,k) = number of open trails of length k starting and ending at fixed distinct vertices in the complete undirected graph on n labeled vertices, for n >= 1 and k = 0 .. n*(n-1)/2.at n=37A357886
• a(n) = 2^(2*n - 1) - 2^(n - 1)*(n - 1).at n=8A376585
• a(n) = (1/4) * Sum_{k>=0} (3/4)^k * Stirling2(n+k,k).at n=3A390892