42543

Appears in sequences

• Integer part of ((4th elementary symmetric function of 1,2,..,n)/(2nd elementary symmetric function of 1,2,...,n)).at n=37A024173
• G.f.: exp( Sum_{n>=1} sigma(2n)*x^n/n ).at n=17A182818
• Partial sums of A299256.at n=30A299262