# A105277 (b-file synthesized from sequence entry)
0 0
1 1
2 5
3 29
4 203
5 1680
6 16058
7 173865
8 2099957
9 27952999
10 406125305
11 6389713034
12 108157272720
13 1958821525361
14 37779732341077
15 772829270394685
16 16708083353842267
17 380563529091632760
18 9106983116342966818
19 228393730451588322201
20 5989333028770423686565