# A104240 (b-file synthesized from sequence entry)
0 0
1 7
2 144
3 504
4 9727
5 187560
6 654840
7 12626287
8 243453384
9 849982464
10 16388911447
11 316002305520
12 1103276584080
13 21272794432567
14 410170749112224
15 1432052156154024
16 27612070784561167
17 532401316345361880
18 1858802595411339720
19 35840446605565962847