# A352816 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 7 4 16 5 40 6 105 7 281 8 770 9 2147 10 6080 11 17431 12 50459 13 147265 14 432821 15 1279978 16 3806154 17 11373668 18 34136769 19 102863360 20 311065038 21 943740309 22 2871717550 23 8762164066 24 26801981013 25 82172139800 26 252470206882 27 777243596670 28 2397210487402 29 7406340364950