# A211249 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 21 4 126 5 819 6 5611 7 39900 8 291719 9 2179181 10 16560175 11 127617168 12 994951887 13 7833555324 14 62196300997 15 497425570173 16 4003607595960 17 32404662671330 18 263586896132154 19 2153631763231319 20 17666722629907960 21 145449082369322208 22 1201414340736684702