# A302769 (b-file synthesized from sequence entry)
1 4
2 22
3 218
4 3048
5 54852
6 1206696
7 31373856
8 941214240
9 32001274080
10 1216048334400
11 51074029319040
12 2349405341418240
13 117470266991078400
14 6343394416560230400
15 367916876148039321600
16 22810846321004081356800
17 1505515857183654020812800
18 105386110002813935877120000