# A054499 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 17
5 79
6 554
7 5283
8 65346
9 966156
10 16411700
11 312700297
12 6589356711
13 152041845075
14 3811786161002
15 103171594789775
16 2998419746654530
17 93127358763431113
18 3078376375601255821
19 107905191542909828013
20 3997887336845307589431