# A144635 (b-file synthesized from sequence entry)
0 1
1 7
2 41
3 225
4 1195
5 6227
6 32059
7 163727
8 831505
9 4206145
10 21215481
11 106782837
12 536618341
13 2693492305
14 13507578125
15 67693008145
16 339066121115
17 1697664211795
18 8497396194275
19 42522326235175
20 212749477704695
21 1064285646397915
22 5323532330953295
23 26625895085494075