# A103457 (b-file synthesized from sequence entry)
0 1
1 4
2 10
3 28
4 82
5 244
6 730
7 2188
8 6562
9 19684
10 59050
11 177148
12 531442
13 1594324
14 4782970
15 14348908
16 43046722
17 129140164
18 387420490
19 1162261468
20 3486784402
21 10460353204
22 31381059610
23 94143178828
24 282429536482
25 847288609444