# A347686 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 13
5 90
6 656
7 4862
8 39938
9 362122
10 3627433
11 39913180
12 478994407
13 6227001093
14 87178250333
15 1307674292294
16 20922789757983
17 355687427756494
18 6402373705060610
19 121645100407007344
20 2432902008172915083
21 51090942171702654311
22 1124000727777596134102
23 25852016738884946540910
24 620448401733239380526706
25 15511210043330985878651420