# A111411 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 4
4 8
5 41
6 120
7 826
8 4602
9 47570
10 473649
11 10093040
12 203861263
13 8821354950
14 467680021214
15 51343335981422
16 7427745026671872
17 2637938775610253117
18 1315874983271581469522
19 1773440184382265096424766
20 4023316751814245493054773044
21 26037772294065481552999203782248