# A180666 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 6
4 15
5 41
6 106
7 279
8 729
9 1911
10 5001
11 13095
12 34281
13 89752
14 234971
15 615165
16 1610520
17 4216400
18 11038675
19 28899630
20 75660210
21 198081006
22 518582802
23 1357667406
24 3554419410
25 9305590831
26 24362353076
27 63781468404