# A042705 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 10
4 63
5 199
6 461
7 660
8 38741
9 39401
10 117543
11 392030
12 2469723
13 7801199
14 18072121
15 25873320
16 1518724681
17 1544598001
18 4607920683
19 15368360050
20 96818080983
21 305822602999
22 708463286981
23 1014285889980