# A233436 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 8
4 50
5 424
6 4472
7 55760
8 797022
9 12801296
10 227829866
11 4446822688
12 94422531876
13 2166975912496
14 53457972027254
15 1410960809766320
16 39680975219789210
17 1184783226216138592
18 37434788449030871076
19 1248022160663960432264
20 43785432805297352937954
21 1612690422384099635004264