# A007046 (b-file synthesized from sequence entry)
3 1
4 3
5 9
6 25
7 70
8 194
9 537
10 1485
11 4104
12 11338
13 31318
14 86498
15 238885
16 659713
17 1821843
18 5031071
19 13893316
20 38366206
21 105947374
22 292570493
23 807923428