# A218216 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 15
4 65
5 175
6 1155
7 7229
8 31081
9 162755
10 1018195
11 5448645
12 28879019
13 171229541
14 991796825
15 5540516759
16 32232757569
17 190448140543
18 1105001828111
19 6463178610505
20 38380301015595
21 227218808375165
22 1344777832158545
23 8022879439995215
24 47988823484272835