# A025264 (b-file synthesized from sequence entry)
1 2
2 1
3 1
4 5
5 22
6 99
7 450
8 2067
9 9586
10 44852
11 211570
12 1005427
13 4810460
14 23157904
15 112110906
16 545524287
17 2666864340
18 13092764136
19 64527778938
20 319157531592
21 1583724160896
22 7882364163954
23 39339994155288
24 196843821874407
25 987272738842392