# A149955 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 51
5 184
6 693
7 2692
8 10723
9 43580
10 180097
11 754633
12 3199231
13 13698780
14 59163153
15 257435987
16 1127562315
17 4967480864
18 21997869745
19 97867848691
20 437234819487
21 1960797069698
22 8823574996525
23 39830921567888
24 180320772151815
25 818502611515670
26 3724380509908409
27 16985106168821193