# A158840 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 42
4 374
5 4391
6 63637
7 1095362
8 21823226
9 493898216
10 12515588806
11 351062669154
12 10798972965266
13 361471373319171
14 13080119556342713
15 508813238759275712
16 21174032937728251318
17 938646693399848483498