# A196795 (b-file synthesized from sequence entry)
0 1
1 4
2 22
3 145
4 1096
5 9259
6 85924
7 865183
8 9364864
9 108173827
10 1325589676
11 17149360111
12 233271228880
13 3324545097475
14 49493784653644
15 767665750130839
16 12376226335249024
17 206967901014192643
18 3583561993192959436
19 64136093489935863583
20 1184711492540805987856