# A271894 (b-file synthesized from sequence entry)
0 1
1 3
2 7
3 20
4 50
5 138
6 356
7 964
8 2524
9 6768
10 17848
11 47624
12 126032
13 335472
14 889328
15 2364352
16 6273184
17 16667808
18 44242240
19 117516608
20 311995328
21 828603648
22 2200088960
23 5842620544
24 15513975040
25 41197898496
26 109395973888
27 290499691520
28 771395887616