# A149461 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 51
5 195
6 817
7 3432
8 14911
9 65235
10 290915
11 1307274
12 5937716
13 27149739
14 125023447
15 578769694
16 2693341575
17 12586059554
18 59046681200
19 277963746827
20 1312588575963
21 6215451532217
22 29507007004207
23 140401812189147
24 669478104046067
25 3198467824446743
26 15308052743597454
27 73385800384796322