# A005115 (b-file synthesized from sequence entry)
1 2
2 3
3 7
4 23
5 29
6 157
7 907
8 1669
9 1879
10 2089
11 249037
12 262897
13 725663
14 36850999
15 173471351
16 198793279
17 4827507229
18 17010526363
19 83547839407
20 572945039351
21 6269243827111