[3,54,126,294,672,1536,3552,8214,19092,44376, 103200,240000,558000,1297350,3015990,7011366, 16299318,37891014,88085676,204773784,476041212, 1106661366,2572675992,5980747104,13903551072, 32321836896,75139155000]