# A121415 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 63
4 924
5 17226
6 387567
7 10182744
8 305379129
9 10280074116
10 383492465902
11 15692864353299
12 698622377024472
13 33604795914668178
14 1736477536255603281
15 95918139377302294980
16 5639487915973132301793
17 351611645300506492405623