# A297928 (b-file synthesized from sequence entry)
0 4
1 13
2 43
3 151
4 559
5 2143
6 8383
7 33151
8 131839
9 525823
10 2100223
11 8394751
12 33566719
13 134242303
14 536920063
15 2147581951
16 8590131199
17 34360131583
18 137439739903
19 549757386751
20 2199026401279
21 8796099313663
22 35184384671743
23 140737513521151
24 562950003752959
25 2251799914348543