# A149987 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 17
4 57
5 197
6 727
7 2749
8 10399
9 40301
10 159574
11 631160
12 2522298
13 10221848
14 41531613
15 169372736
16 696855374
17 2879429468
18 11915981127
19 49573590322
20 207133252404
21 866652990044
22 3636829064055
23 15317311427914
24 64620435352636
25 273084047111032
26 1157214293358466
27 4912795094807380