# A005778 (b-file synthesized from sequence entry)
1 1
2 9
3 72
4 320
5 1185
6 3892
7 11776
8 33480
9 90745
10 236808
11 599112
12 1477216
13 3564001
14 8439960
15 19666688
16 45183824
17 102520881
18 230046452
19 511085960
20 1125313056
21 2457641857
22 5327760940
23 11471647872
24 24547187800
25 52225646057
26 110524638672