# A096148 (b-file synthesized from sequence entry)
1 2
2 3
3 5
4 7
5 23
6 37
7 53
8 73
9 223
10 233
11 337
12 523
13 733
14 773
15 5233
16 33377
17 72733
18 272333
19 572333
20 5222333