108262

Appears in sequences

• Number of terms in 5th derivative of a function composed with itself n times.at n=36A022815
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= n/2.at n=20A047161
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= (n-1)/2.at n=20A047172
• Diagonal sums of Riordan array ((1-2x)/(1 - 3x + x^2),x(1-x)/(1 - 3x + x^2)).at n=12A147704
• a(n) = n*(2*n^2 + 5*n + 3).at n=37A163815
• Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3, p_4} = {-1,0,1,2}, n=3*r+p_i, and define a(-1)=0. Then a(n)=a(3*r+p_i) gives the quantity of H_(9,3,0) tiles in a subdivided H_(9,i,r) tile after linear scaling by the factor Q^r, where Q=sqrt(x^3-2*x) with x=2*cos(Pi/9).at n=37A187505
• Number of defective 4-colorings of an n X 1 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.at n=11A229472
• a(n) = n*(n+1)*(n+2)*(n+3)*(n^2+3*n+26)/720.at n=18A257200
• Non-repdigit numbers k that divide A045876(k).at n=20A276413
• 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 222", based on the 5-celled von Neumann neighborhood.at n=16A279986
• G.f. satisfies A(x) = 1 + x^4*A(x)^3*(1 + x*A(x)).at n=29A365729
• a(n) is the number of 2 X 2 matrices with elements 1..n where at least one row, at least one column and at least one of the two diagonals is strictly increasing.at n=22A391092