# A148968 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 31
5 109
6 397
7 1469
8 5527
9 21011
10 80569
11 311003
12 1207035
13 4704737
14 18403149
15 72198531
16 283942611
17 1118999005
18 4417672911
19 17466703087
20 69149566107
21 274065214899
22 1087279220395
23 4317148394761
24 17154423083379
25 68208723922417
26 271365767997697
27 1080171683737141
28 4301583514903391