# A213907 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 34
4 61
5 261
6 709
7 1324
8 4937
9 15040
10 28561
11 107262
12 248341
13 522445
14 1972363
15 7591936
16 8835345
17 26421129
18 145475533
19 183752250
20 701184621
21 2234736295
22 2996725227
23 15105451596
24 32483720761
25 77618520551
26 217809217211
27 625456400842
28 1638545943301