# A024498 (b-file synthesized from sequence entry)
1 2
2 3
3 6
4 17
5 50
6 154
7 490
8 1608
9 5402
10 18475
11 64130
12 225346
13 800046
14 2865471
15 10341168
16 37567524
17 137270954
18 504174183
19 1860277042
20 6892326441
21 25631327354
22 95640861987
23 357975249026
24 1343650153462
25 5056424257510
26 19073789728773
27 72108867616596