# A007141 (b-file synthesized from sequence entry)
1 1
2 2
3 7
4 22
5 75
6 250
7 886
8 3150
9 11525
10 42698
11 160636
12 610694
13 2345584
14 9081850
15 35422281
16 139022744
17 548671671
18 2176051206
19 8668363781
20 34667284600
21 139140831224
22 560271494924
23 2262709876353
24 9163000968906
25 37198940600718
26 151364381619042