82021944domain: NAppears in sequencesp-INVERT of (1,1,1,1,1,...), where p(S) = 1 - 3 S^2 + 2 S^3.at n=24A291023a(n) is the number whose base-4 digits are 1 followed by the first n-1 terms of the periodic sequence with initial period 0,3,2.at n=13A378499