# A154259 (b-file synthesized from sequence entry)
1 1
2 2
3 7
4 30
5 155
6 950
7 6706
8 52996
9 459256
10 4303020
11 43163392
12 460170882
13 5184956805
14 61468942912
15 763967696243
16 9924157671028
17 134400823231643
18 1893397004671954
19 27693154054839058
20 419804185629085664