# A153917 (b-file synthesized from sequence entry)
0 1
1 2
2 1
3 1
4 2
5 1
6 4
7 13
8 18
9 49
10 140
11 188
12 406
13 1769
14 3341
15 8622
16 44447
17 84993
18 281707
19 1724133
20 3711938
21 16716005
22 125407513
23 356014822
24 1906068709
25 17144172762
26 59257809503
27 359265884506
28 3898069443043