7741440

Appears in sequences

• Denominators of Bernoulli polynomials B(n)(x).at n=13A001898
• Variant of A095236, where first two people choose payphones at the ends.at n=17A095240
• Number of spanning trees in C_6 X P_n.at n=2A158880
• Number A(n,k) of spanning trees in C_k X P_n; square array A(n,k), n>=1, k>=1, read by antidiagonals.at n=30A173958
• a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = abs(i^2-j^2).at n=5A278858
• Totients whose inverses contain two or more consecutive tetrahedral pyramidal numbers.at n=12A318988
• Triangle read by rows: T(n,k) is the number of polygons with 2*n sides, of which k run through the center of a circle, on the circumference of which the 2*n vertices of the polygon are arranged at equal spacing.at n=33A330662
• a(n) = sqrt( Product_{1<=j, k<=n-1} (4*sin(j*Pi/n)^2 + 4*cos(k*Pi/n)^2) ).at n=6A340563
• Number of copies of the star graph S(2,1,1,1) contained in the n-dimensional hypercube graph.at n=9A351632
• Row sums of A387138.at n=9A387139
• The least number k that is not n-free whose sum of n-free divisors is larger than 2*k.at n=11A387154
• Numbers k such that there exist three numbers x, y and z such that k = psi(x) = psi(y) = psi(z) = x + y + z.at n=24A387290