# A162480 (b-file synthesized from sequence entry)
0 1
1 4
2 21
3 126
4 797
5 5190
6 34439
7 231556
8 1572135
9 10754148
10 74001735
11 511686726
12 3552251429
13 24743806370
14 172853699427
15 1210514603212
16 8495774193707
17 59739915525288
18 420785972800187
19 2968344133842182
20 20967995689677183