# A318912 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 11
4 53
5 309
6 2359
7 18367
8 168489
9 1690217
10 19416491
11 233144691
12 3187062493
13 44901291421
14 700058510943
15 11509417045799
16 200586478516049
17 3680237286827217
18 72326917665944659
19 1467930587827522267
20 31855597406715020421
21 718484783876745110021
22 16993553696264436052103