# A174662 (b-file synthesized from sequence entry)
0 1
1 3
2 8
3 24
4 88
5 400
6 2212
7 14500
8 110116
9 951076
10 9205156
11 98646436
12 1159016356
13 14808626596
14 204358994596
15 3028436306596
16 47955883346596
17 807990334802596
18 14430691329362596
19 272302801683794596
20 5412861968581970596