# A020120 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 13 5 59 6 333 7 2233 8 17226 9 150104 10 1458150 11 15623032 12 183012660 13 2326875240 14 31911431854 15 469553925839 16 7378704548889 17 123329776031415 18 2184698889699347 19 40885079221516336 20 806020133224179177