# A211291 (b-file synthesized from sequence entry) 0 1 1 3 2 9 3 25 4 69 5 192 6 537 7 1508 8 4249 9 12009 10 34044 11 96795 12 275989 13 789040 14 2261594 15 6497986 16 18712521 17 54002913 18 156162531 19 452435327 20 1313117536 21 3817402150 22 11114803333 23 32408592752 24 94623871921 25 276620070867 26 809602760028 27 2372089156969 28 6957106088502 29 20423727601032 30 60009849519354