# A013449 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 1
4 0
5 15
6 10
7 271
8 840
9 8215
10 60870
11 423091
12 4980580
13 35126715
14 501501130
15 4192844111
16 63445348720
17 652228720015
18 10063325322190
19 125163350892331
20 1976669210391260
21 28804173376146115