# A358863 (b-file synthesized from sequence entry) 2 4 3 28 4 16 5 176 6 4950 7 8910 8 1408 9 346500 10 277992 11 7542080 12 326656 13 544320 14 120400000 15 145213440 16 48549888 17 4733575168 18 536813568 19 2149576704 20 3057500160 21 938539560960 22 1358951178240 23 36324805836800 24 99956555776 25 49212503949312 26 118747221196800 27 59461613912064 28 13749193801728