# A267324 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 32 7 288 8 2448 9 22080 10 216000 11 2298240 12 26530560 13 330946560 14 4441651200 15 63866880000 16 980037273600 17 15990989414400 18 276529539686400 19 5052853757952000 20 97290972979200000 21 1969085601939456000 22 41794695550992384000 23 928395406320205824000