18304

Appears in sequences

• Character of extremal vertex operator algebra of rank 10.at n=5A028529
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 67.at n=37A031565
• Triangle giving a(n,k) = number of k-colored labeled graphs with n nodes.at n=16A046860
• a(1) = 11; for n > 0, a(n+1) = a(n) * sum of digits of a(n).at n=4A047902
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-4)/2.at n=20A048069
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n+3)/3.at n=20A048091
• Trajectory of 1001 under "3x+1" map.at n=32A100709
• Expansion of g.f. c(2*x)^4, where c(x) is the g.f. of A000108.at n=5A101596
• Riordan array (1, x*c(2x)), c(x) the g.f. of A000108.at n=49A110510
• Coefficient table for polynomials related to the eigenfunctions of a certain Schroedinger problem (Poeschl-Teller I).at n=61A130415
• G.f. A(x) satisfies: 5*A(x) = A(A(A(A(x)))) + 4*x + x^2 with A(0)=0.at n=4A138914
• a(n) = binomial(n+2,3)*4^3.at n=10A141478
• Lower triangular array called S1hat(4) related to partition number array A144885.at n=49A144886
• Riordan array (c(2x)^2,xc(2x)), c(x) the g.f. of A000108.at n=30A167432
• Number of open knight's tour diagrams of a 3 X n chessboard that are symmetric under 180-degree rotation and have "type F": the endpoints occur in different columns and agree in color with the cells in the nearest corner.at n=15A169774
• Number of genus 3, degree n, simply ramified covers of an elliptic curve.at n=3A170992
• a(n) = binomial(n+10, 10)*4^n.at n=3A172978
• Number of regular octahedra that can be formed using the points in an (n+1)X(n+1)X(n+1) lattice cube.at n=14A178797
• Numbers with prime signature {7,1,1}, i.e., of form p^7*q*r with p, q and r distinct primes.at n=23A179696
• Triangle read by rows, T(n,k) for 0<=k<=n, generalizes the Motzkin lattice paths with weights of A003645.at n=22A201639