116698domain: NAppears in sequencesTriangle T(n,k), read by rows, given by (1,0,2,1,3,2,4,3,5,4,6,5,7,6,8,7,9,8,...) DELTA (0,1,0,1,0,1,0,1,0,1,0,1,0,1,...) where DELTA is the operator defined in A084938.at n=48A200545a(n) = 57*2^(n-1) - 38 (n >= 1).at n=11A304513