# A108884 (b-file synthesized from sequence entry)
0 1
1 2
2 3
3 20
4 1
5 42
6 231
7 3432
8 12870
9 48620
10 16796
11 88179
12 117572
13 10400600
14 2111400
15 3447056
16 100180065
17 51857916
18 756261275
19 35345263800
20 68923264410
21 48932534040
22 420819792744
23 8233430727600
24 10749201227700
25 63205303218876
26 15997372030584