# A067431 (b-file synthesized from sequence entry)
0 21
1 55
2 131
3 275
4 550
5 1058
6 1985
7 3653
8 6625
9 11875
10 21084
11 37140
12 64989
13 113075
14 195775
15 337507
16 579650
17 992182
18 1693225
19 2881825
20 4892861
21 8288915
22 14013816
23 23649000
24 39841125
25 67014703
26 112558715