# A168358 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 58 4 458 5 4120 6 40569 7 426842 8 4723890 9 54402904 10 646992474 11 7900772120 12 98642862232 13 1254984808672 14 16227116787737 15 212790354730842 16 2824992774357362 17 37915366854924952 18 513837166842215970