# A056589 (b-file synthesized from sequence entry)
0 1
1 4
2 16
3 53
4 166
5 492
6 1413
7 3960
8 10912
9 29689
10 80026
11 214196
12 570289
13 1512300
14 3998160
15 10545741
16 27766942
17 73012060
18 191785165
19 503378480
20 1320425536
21 3462057009
22 9074076786
23 23776857828
24 62289901081
25 163159711492