# A048713 (b-file synthesized from sequence entry)
0 21
1 65
2 325
3 1105
4 5397
5 16705
6 83013
7 283985
8 1376277
9 4259905
10 21299525
11 72418385
12 353703189
13 1094795585
14 5440291909
15 18611524945
16 90194313237
17 279172874305
18 1395864371525
19 4745938863185
20 23179938501909