# A003851 (b-file synthesized from sequence entry) 1 23499295948800 2 1289512799941305139200 3 1154606796534757164318720000 4 6807663884896875000000000000000 5 52386144472825139642572263782154240000 6 42863636354909175368011800612065142374400 7 2154683673871373733440812330742751559680000