# A058499 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 20
5 52
6 152
7 432
8 1292
9 3876
10 11900
11 36856
12 115728
13 366348
14 1170280
15 3764080
16 12186584
17 39673332
18 129812956
19 426648632
20 1407939880
21 4663160064
22 15496048156
23 51650777864
24 172639344440
25 578511221636
26 1943155984792