# A069699 (b-file synthesized from sequence entry)
1 0
2 1
3 3
4 6
5 10
6 15
7 21
8 28
9 36
10 45
11 55
12 66
13 78
14 91
15 171
16 276
17 378
18 1770
19 2775
20 5778
21 8778