-8204domain: ZAppears in sequencesExpansion of (1-3x)/(1-x^2+x^3).at n=31A117374Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(e).at n=15A279595Row 2 in rectangular array A292929.at n=23A294065