# A274054 (b-file synthesized from sequence entry)
0 1
1 1
2 0
3 1
4 3
5 6
6 14
7 40
8 140
9 422
10 1346
11 4487
12 15234
13 52632
14 183913
15 651948
16 2336751
17 8438406
18 30712379
19 112603500
20 415459873
21 1541646225
22 5750112809
23 21548036621
24 81096740799
25 306404247854
26 1161863199131
27 4420429256826
28 16869986745367
29 64567073382731