26448

Appears in sequences

• Aliquot sequence starting at 660.at n=8A014362
• Expansion of phi(x) / f(-x) in powers of x where phi(), f() are Ramanujan theta functions.at n=31A029552
• Coefficient of q^1 in nu(n), where nu(0)=1, nu(1)=b and, for n>=2, nu(n)=b*nu(n-1)+lambda*(1+q+q^2+...+q^(n-2))*nu(n-2) with (b,lambda)=(2,3).at n=9A074087
• Diagonal sums of number array A082043.at n=15A082045
• a(n) = (2*n^3 + 5*n^2 - 3*n)/2.at n=28A162256
• (1+e)-sigma amicable numbers.at n=14A274116
• Lesser of recursive amicable numbers pair: numbers m < k such that m = s(k) and k = s(m), where s(k) = A333926(k) - k is the sum of proper recursive divisors of k.at n=7A333929
• The number of polyominoes with n cells which support p4 tiling of the plane.at n=6A342409
• Number of connected minimal dominating sets in the n-trapezohedral graph.at n=21A381190