# A151372 (b-file synthesized from sequence entry)
0 1
1 0
2 3
3 4
4 26
5 80
6 387
7 1596
8 7518
9 34656
10 167310
11 813384
12 4040212
13 20285408
14 103195235
15 530042604
16 2748206006
17 14362312640
18 75609109594
19 400620871608
20 2135307326508
21 11442213676512
22 61615122713550
23 333282537518040
24 1810222600024044
25 9869776566646080
26 54002852920884540
27 296449512451881360