73397domain: NAppears in sequencesDefine sequence S(a_0,a_1) by a_{n+2} is least integer such that a_{n+2}/a_{n+1}>a_{n+1}/a_n for n >= 0. This is S(3,4).at n=19A018908Pisot sequence L(6,10).at n=17A048587Expansion of (2-x-x^2-x^3)/((1-x)*(1-x^2-x^3)).at n=43A052954