# A149756 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 17
4 85
5 329
6 1645
7 6913
8 34565
9 152729
10 763645
11 3482097
12 17410485
13 81061001
14 405305005
15 1914744673
16 9573723365
17 45711939705
18 228559698525
19 1100105774033
20 5500528870165
21 26640170717033
22 133200853585165
23 648290412642625
24 3241452063213125
25 15838421978898265
26 79192109894491325