# A121135 (b-file synthesized from sequence entry)
3 1
4 2
5 8
6 22
7 74
8 208
9 598
10 1600
11 4248
12 10880
13 27512
14 68096
15 166528
16 401408
17 957728
18 2260992
19 5292672
20 12288000
21 28329344
22 64880640
23 147721216
24 334495744
25 753670656
26 1690304512
27 3774887936
28 8396996608
29 18610157568
30 41104179200