# A163133 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 4 5 11 6 42 7 196 8 988 9 5314 10 30724 11 189962 12 1244264 13 8583042 14 62112639 15 469917193 16 3707053139 17 30421506639 18 259182853643 19 2288352779166 20 20904648990227 21 197305045507448 22 1921509079008868 23 19285642292478101