# A149764 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 19
4 73
5 299
6 1265
7 5435
8 23641
9 103813
10 460001
11 2052807
12 9213259
13 41554885
14 188228345
15 855734883
16 3902932219
17 17852219099
18 81867457369
19 376297840835
20 1733227480133
21 7998362063665
22 36974103353355
23 171192071662033
24 793788595642235
25 3685643977371843
26 17134313003875339
27 79749310147234405