# A057666 (b-file synthesized from sequence entry) 0 0 1 960 2 10800 3 60480 4 235200 5 725760 6 1905120 7 4435200 8 9408960 9 18532800 10 34354320 11 60540480 12 102211200 13 166333440 14 262180800 15 401863680 16 600935040 17 879076800 18 1260871920 19 1776667200 20 2463531840 21 3366316800 22 4538820000