# A156790 (b-file synthesized from sequence entry)
0 0
1 1
2 8
3 41
4 183
5 770
6 3149
7 12730
8 51209
9 205356
10 822500
11 3292134
12 13172634
13 52698912
14 210812207
15 843281848
16 3373193506
17 13492906143
18 53971888157
19 15888078393
20 863553363881
21 3454215553470
22 13816866413106
23 55267474046659