# A144656 (b-file synthesized from sequence entry)
0 0
1 1
2 0
3 1
4 4
5 49
6 900
7 24649
8 944784
9 48455521
10 3210355600
11 267186643801
12 27307626948900
13 3363915436531441
14 491705171699154084
15 84158959760104032049
16 16675767262618669710400
17 3787671541267275818341249
18 977702867682508392324162624
19 284628954669920840314598014801