# A091521 (b-file synthesized from sequence entry) 0 1 1 4 2 12 3 28 4 84 5 212 6 632 7 1544 8 4584 9 11220 10 33060 11 80152 12 234648 13 565192 14 1643552 15 3926832 16 11337422 17 26852656 18 76981660