# A150077 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 18
4 66
5 237
6 910
7 3560
8 14383
9 58323
10 241477
11 1013972
12 4289049
13 18269560
14 78604459
15 340648176
16 1481407067
17 6480432790
18 28510899226
19 125905971260
20 557644102835
21 2480504628972
22 11071416464544
23 49534764140683
24 222208424115990
25 999782628006911
26 4508245709404073
27 20367352284091797