50468domain: NAppears in sequencesRounded base-2 logarithm of A082128(n).at n=30A082129Expansion of (1-4x)/((1-x)(1-3x)(1-5x)).at n=7A087439Constant term of the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=18A192749E.g.f.: 1 / Product_{n>=1} (cos(x^n/n) - sin(x^n/n)).at n=7A209299