# A149759 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 19
4 71
5 287
6 1211
7 5209
8 22433
9 97741
10 431877
11 1921997
12 8605981
13 38690161
14 174755445
15 793122851
16 3611837535
17 16499831447
18 75559798515
19 346876213967
20 1596359816971
21 7361342844775
22 34008838169115
23 157366474726651
24 729297458819767
25 3384981878898179
26 15731819597690843
27 73204456226077479