# A037133 (b-file synthesized from sequence entry)
0 0
1 2
2 12
3 58
4 307
5 1550
6 7781
7 39003
8 195195
9 976315
10 4882299
11 24413043
12 122068292
13 610347461
14 3051749613
15 15258772698
16 76293912556
17 381469661013
18 1907348501745
19 9536742901936
20 47683715296045
21 238418578052990
22 1192092893410662
23 5960464473344773