# A149440 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 47
5 178
6 717
7 2931
8 12206
9 51725
10 222382
11 965695
12 4229004
13 18663791
14 82908381
15 370362024
16 1662456328
17 7494619832
18 33916523818
19 154011480462
20 701493894387
21 3204032461602
22 14671001493623
23 67330937214095
24 309654418218959
25 1426834603648238
26 6586249762098228
27 30451755568889279