# A012363 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 7
4 36
5 285
6 2662
7 30147
8 395976
9 5968505
10 101054282
11 1901962687
12 39368308716
13 889051951125
14 21749632880302
15 573017429752827
16 16174993678778256
17 487024011982108145
18 15580632579831576722