# A047104 (b-file synthesized from sequence entry)
2 1
3 2
4 5
5 21
6 89
7 340
8 1312
9 5106
10 19782
11 76676
12 297776
13 1157609
14 4505193
15 17554888
16 68480902
17 267420957
18 1045329995
19 4089922224
20 16015961548
21 62768643959
22 246184737835
23 966243694608
24 3794894344275
25 14913585439328