# A005777 (b-file synthesized from sequence entry)
1 1
2 4
3 18
4 96
5 265
6 672
7 1617
8 3776
9 8577
10 19080
11 41745
12 90048
13 191945
14 404992
15 846945
16 1757440
17 3621697
18 7417800
19 15109313
20 30623520
21 61788489
22 124158496
23 248549937
24 495852480
25 986076225
26 1955203016
27 3866245425
28 7625813888
29 15005718153