# A143696 (b-file synthesized from sequence entry) 1 4 2 10 3 24 4 46 5 72 6 260 7 400 8 766 9 1584 10 2900 11 4104 12 19596 13 16392 14 67240 15 139968 16 196606 17 266256 18 1098760 19 1048584 20 3416604 21 10454400 22 10506260 23 16810000 24 83667116 25 75497616 26 167854100 27 415239264 28 1275614776 29 1073741832 30 6341140000 31 6179217664 32 12884901886