# A151484 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 15
4 61
5 269
6 1245
7 5935
8 29128
9 145871
10 743421
11 3843154
12 20108453
13 106304763
14 567011174
15 3047948601
16 16496553378
17 89828010025
18 491790403030
19 2705562067688
20 14949910812086
21 82936556715572
22 461770124064327
23 2579548304347117
24 14453779059407019
25 81214726367783785
26 457521215541829301