40183domain: NAppears in sequencesNumbers k such that the period of the continued fraction for sqrt(k) contains exactly 23 ones.at n=31A031791Members of A159053 which are not multiples of 3.at n=8A159054Number of n X 2 0..1 arrays with each 1 adjacent to 2 or 4 king-move neighboring 1s.at n=12A296033