# A145558 (b-file synthesized from sequence entry)
1 1
2 6
3 15
4 420
5 36
6 1386
7 36036
8 40040
9 6126120
10 2116296
11 255816
12 267711444
13 3346393050
14 1745944200
15 6850263420
16 14440355289360
17 1604483921040
18 3800093497200
19 2671465728531600
20 534293145706320
21 952435607563440
22 941958815880242160
23 362291852261631600