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A018897 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 105911904
9 0
10 0
11 0
12 1838630653440
13 0
14 509913567887360
15 1721378550054912
16 131916883632582384
17 2108688723817267200
18 74239828158397841408
19 1712014250742613278720
20 63207760722959840830976
21 2147443289652067471196160

[1,0,0,0,0,0,0,0,105911904,0,0,0,1838630653440,0,
 509913567887360,1721378550054912,
 131916883632582384,2108688723817267200,
 74239828158397841408,1712014250742613278720,
 63207760722959840830976,2147443289652067471196160]

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)