# A153986 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 2
4 2
5 4
6 9
7 15
8 37
9 88
10 191
11 729
12 2246
13 6555
14 31434
15 144150
16 601688
17 3970089
18 24322158
19 135488789
20 1251604698
21 10410417129
22 79632436378
23 997602199170
24 11483571472544
25 120898733308159
26 2073714604283068
27 32605974669636948