# A058821 (b-file synthesized from sequence entry)
0 1
1 6
2 21
3 146
4 981
5 6222
6 38921
7 239946
8 1469826
9 8957976
10 54420339
11 329815506
12 1995387801
13 12056025246
14 72766743801
15 438839319470
16 2644790643216
17 15930973595046
18 95917737415956
19 577288174746786
20 3473350521083199
21 20892333943230346
22 125638899138654861