# A344062 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 12 4 36 5 135 6 432 7 1539 8 4860 9 17496 10 55404 11 192456 12 623295 13 2125764 14 6849684 15 23442453 16 75110328 17 252965916 18 822670668 19 2735858268 20 8838926712 21 29501352792 22 95090206689 23 314068876416 24 1018141045092 25 3342663979092 26 10798571289897 27 35481518064576