# A131910 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 26
5 79
6 274
7 964
8 3496
9 12664
10 46157
11 168240
12 615173
13 2256669
14 8321911
15 30871862
16 115280183
17 433247309
18 1638036186
19 6225871432
20 23769249188
21 91077899373
22 350002189936
23 1348065993111
24 5201249282212
25 20094668668700