# A007144 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 16
5 177
6 1374
7 9370
8 60582
9 383577
10 2412331
11 15179013
12 95860821
13 608523299
14 3884620950
15 24937791531
16 160952346541
17 1044035753142
18 6803694176919
19 44526622599370
20 292538816181867
21 1928821043343096
22 12758939344710713