# A098814 (b-file synthesized from sequence entry)
1 2
2 6
3 42
4 144
5 72
6 312
7 144
8 234
9 1512
10 672
11 2226
12 1104
13 34632
14 267894
15 371634
16 909030
17 384750
18 3198240
19 2445810
20 1639494