# A364370 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 6 4 160 5 1720 6 13056 7 82656 8 470016 9 2496384 10 12666880 11 62250496 12 298868736 13 1409660928 14 6556483584 15 30148976640 16 137316794368 17 620328091648 18 2782435737600 19 12402204475392 20 54971691171840 21 242433274675200