# A222958 (b-file synthesized from sequence entry) 1 20 2 20 3 400 4 400 5 8000 6 8000 7 323600 8 215892 9 14843920 10 9734400 11 1138729280 12 631004724 13 117308595520 14 59768363024 15 14742894291200 16 7399937947392 17 2167430898315280 18 1074761911462928 19 361218009407664960