# A149560 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 13
4 59
5 193
6 901
7 3271
8 15491
9 59357
10 283649
11 1126583
12 5423549
13 22084073
14 106895167
15 443477691
16 2155148575
17 9072490125
18 44228408951
19 188384093539
20 920685526563
21 3959627932739
22 19391369317233
23 84077089660291
24 412450227537063
25 1800727501511157
26 8846406937814897
27 38854506687500175