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A023938 as a simple table

n a(n)
0 1
1 0
2 2340
3 26880
4 198510
5 752640
6 2777320
7 6666240
8 18056580
9 34222080
10 76790952
11 126124800
12 251743800
13 373201920
14 684788880
15 946636800
16 1632682350
17 2136207360
18 3505616460
19 4398078720
20 6969644136
21 8433039360
22 12913865640
23 15239485440
24 22786814120

[1,0,2340,26880,198510,752640,2777320,6666240,
 18056580,34222080,76790952,126124800,251743800,
 373201920,684788880,946636800,1632682350,
 2136207360,3505616460,4398078720,6969644136,
 8433039360,12913865640,15239485440,22786814120]

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Last modified June 18 08:27 EDT 2024. Contains 373472 sequences. (Running on oeis4.)