# A149949 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 50
5 175
6 643
7 2442
8 9497
9 37772
10 152757
11 626466
12 2602060
13 10918685
14 46235865
15 197396778
16 848640258
17 3671712505
18 15976961310
19 69874586990
20 307024031593
21 1354759662530
22 6001007238525
23 26676880710809
24 118977537295689
25 532239704904251
26 2387650011379440
27 10739032580822009