# A047033 (b-file synthesized from sequence entry)
1 1
2 1
3 4
4 14
5 52
6 195
7 736
8 2789
9 10620
10 40611
11 155860
12 600002
13 2315912
14 8959834
15 34735000
16 134903491
17 524786380
18 2044434535
19 7975049436
20 31146540719
21 121774481668
22 476576304999
23 1866821827500
24 7318739927465
25 28714752439872