# A148725 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 25
5 72
6 278
7 916
8 3672
9 12993
10 53655
11 199801
12 841352
13 3247398
14 13885219
15 55084307
16 238324288
17 965836929
18 4218990574
19 17394476665
20 76585028175
21 320237085936
22 1419355904803
23 6005418138172
24 26768693800482
25 114400021806862
26 512438742183608
27 2208901209753286
28 9937017305427740