# A233919 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 6 5 18 6 42 7 111 8 279 9 752 10 1990 11 5376 12 14707 13 40465 14 111970 15 311997 16 873239 17 2455818 18 6933060 19 19640273 20 55813426 21 159047591 22 454373344 23 1301016216 24 3733009232 25 10731465131 26 30904208376 27 89140202911 28 257498974953 29 744861243809 30 2157405104355