# A368178 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 54 4 375 5 2848 6 22981 7 193742 8 1688427 9 15101778 10 137930199 11 1281629088 12 12081441411 13 115288530516 14 1111783691037 15 10819906562622 16 106147110898419 17 1048748721598078 18 10427413491373843 19 104265186535823798 20 1047894080773661481