# A027318 (b-file synthesized from sequence entry)
3 1
4 42
5 420
6 3786
7 33648
8 297940
9 2633872
10 23265744
11 205446960
12 1814136746
13 16021697220
14 141535810130
15 1250763720312
16 11057433981126
17 97794407702052
18 865284559977150
19 7659315417653664
20 67827407480624862
21 600898634852988364
22 5325658497658529790