200475domain: NAppears in sequencesOdd numbers divisible by exactly 9 primes (counted with multiplicity).at n=21A046322Number of imprimitive (periodic) 2n-bead black-white reversible necklaces with n black beads.at n=26A115120n Sum_n Sum_n Sum_n.at n=8A259455Numbers k such that A360327(k) > 2*k.at n=19A360328