# A037231 (b-file synthesized from sequence entry)
1 2
2 3
3 7
4 23
5 43
6 139
7 283
8 659
9 1319
10 5179
11 9227
12 23159
13 55399
14 148439
15 366683
16 793439
17 1953839
18 4875119
19 9750239
20 27353747
21 71815607
22 192287243
23 430893643