# A115106 (b-file synthesized from sequence entry)
0 1
1 4
2 12
3 20
4 136
5 392
6 1408
7 4544
8 15040
9 48896
10 159232
11 516608
12 1675264
13 5427200
14 17575936
15 56901632
16 184188928
17 596148224
18 1929379840
19 6244007936
20 20206845952
21 65392345088
22 211617316864
23 684814499840
24 2216119238656