# A145222 (b-file synthesized from sequence entry) 1 0 2 0 3 3 4 0 5 30 6 120 7 945 8 7392 9 66780 10 667440 11 7342335 12 88107360 13 1145396538 14 16035550440 15 240533257965 16 3848532125760 17 65425046139960 18 1177650830516832 19 22375365779822715 20 447507315596450880 21 9397653627525472470 22 206748379805560389720 23 4755212735527888968873