# A206639 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 18
4 91
5 489
6 2751
7 15985
8 95218
9 578324
10 3568084
11 22299964
12 140885754
13 898292262
14 5772951668
15 37355908797
16 243184468271
17 1591567315702
18 10465836784159
19 69114490893596
20 458171948148640
21 3047865264442504
22 20339282134624054
23 136122586785459512