# A227469 (b-file synthesized from sequence entry)
0 1
1 3
2 20
3 245
4 4554
5 115192
6 3709992
7 145597545
8 6750522350
9 361424043596
10 21958844607336
11 1493260499980119
12 112400273159533800
13 9279595605913516080
14 833858283261973732944
15 81027308003810095983825
16 8466793463341565312119830
17 946776552967215128481968260
18 112816032067073649248569919400