# A049601 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 3
4 12
5 25
6 76
7 182
8 504
9 1275
10 3410
11 8811
12 23256
13 60580
14 159094
15 415715
16 1089648
17 2850645
18 7466468
19 19541994
20 51170460
21 133951675
22 350713222
23 918141623
24 2403786672
25 6293097000
26 16475700746
27 43133687427
28 112925875764