# A233003 (b-file synthesized from sequence entry)
1 0
2 1
3 0
4 36
5 900
6 8100
7 0
8 25401600
9 514382400
10 12859560000
11 6224027040000
12 56016243360000
13 9466745127840000
14 1855482045056640000
15 0
16 6679735362203904000000
17 13513104637738497792000000
18 156365925093831188736000000
19 225792395835492236534784000000
20 22579239583549223653478400000000