# A163697 (b-file synthesized from sequence entry)
1 4
2 21
3 80
4 259
5 775
6 2223
7 6336
8 17796
9 48912
10 131828
11 350506
12 923197
13 2413779
14 6272766
15 16221462
16 41787691
17 107324054
18 274986699
19 703245913
20 1795790220
21 4580304063
22 11671650321
23 29720454413