# A067923 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 8
5 12
6 135
7 199
8 378
9 600
10 1836
11 4897
12 8198
13 8993
14 84887
15 450287
16 892157
17 5053447
18 5183243
19 15350505
20 19963471
21 31631271
22 37655416
23 2138752269
24 4805947342
25 14508700588
26 27508373127
27 28635924075
28 30814114095
29 32073629885
30 961160400603
31 3607716972786