# A349514 (b-file synthesized from sequence entry)
0 1
1 4
2 24
3 192
4 1792
5 18240
6 196224
7 2194176
8 25247232
9 296979456
10 3555010560
11 43165900800
12 530362220544
13 6581594275840
14 82373440339968
15 1038579580796928
16 13179023462498304
17 168183976239562752
18 2157085003249876992
19 27790652486543474688
20 359485965093121818624