# A006215 (b-file synthesized from sequence entry)
0 0
1 16
2 122
3 800
4 5296
5 36976
6 275792
7 2204480
8 18870016
9 172585936
10 1681843712
11 17411416160
12 190939611136
13 2211961358896
14 26999750469632
15 346419349043840
16 4661658528710656
17 65657186909139856
18 966054350401175552
19 14822897275566895520