# A298611 (b-file synthesized from sequence entry)
0 1
1 3
2 13
3 67
4 349
5 1875
6 10285
7 57123
8 320317
9 1809587
10 10283149
11 58714627
12 336579101
13 1935878419
14 11166265837
15 64566715363
16 374148669949
17 2172215118963
18 12632572359757
19 73575490895043
20 429102329027293
21 2505638311638739
22 14647279574704045
23 85710562407867555