# A002705 (b-file synthesized from sequence entry)
0 0
1 4
2 40
3 468
4 5828
5 76260
6 1032444
7 14316584
8 202116108
9 2893451652
10 41886157564
11 611902123284
12 9007199254740
13 133439988963012
14 1987795697598012
15 29752813022112180
16 447193795726343004
17 6746237832670921768
18 102105221251235572188