37325880domain: NAppears in sequencesExpansion of (1+x)^2/(1-18*x+x^2).at n=6A004292Numerators of continued fraction convergents to sqrt(245).at n=14A041458Number of n X 2 binary arrays with all 1s connected, a path of 1s from upper left corner to lower right corner, and no 1 having more than two 1s adjacent.at n=35A163685