# A033550 (b-file synthesized from sequence entry)
0 2
1 2
2 5
3 15
4 43
5 118
6 316
7 836
8 2199
9 5769
10 15117
11 39592
12 103670
13 271430
14 710633
15 1860483
16 4870831
17 12752026
18 33385264
19 87403784
20 228826107
21 599074557
22 1568397585
23 4106118220
24 10749957098
25 28143753098
26 73681302221
27 192900153591