# A145312 (b-file synthesized from sequence entry) 0 4320 1 40320 2 210240 3 604800 4 1814400 5 3467520 6 7862400 7 13080960 8 24494400 9 35164800 10 64753920 11 82293120 12 135233280 13 177811200 14 269625600 15 320785920 16 500346720 17 563068800 18 838857600 19 970905600 20 1329229440 21 1477681920 22 2170022400 23 2268144000 24 3085992000