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A138406 as a simple table

n a(n)
1 24
2 216
3 3000
4 16464
5 159720
6 369096
7 1414944
8 2469240
9 6424176
10 20486760
11 28599360
12 69293304
13 115787280
14 146928936
15 229241184
16 418046616
17 714718920
18 844369320
19 1349824344
20 1803871440
21 2072682576
22 3076563360
23 3938468856

[24,216,3000,16464,159720,369096,1414944,2469240,
 6424176,20486760,28599360,69293304,115787280,
 146928936,229241184,418046616,714718920,844369320,
 1349824344,1803871440,2072682576,3076563360,
 3938468856]

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Last modified February 7 16:02 EST 2023. Contains 360127 sequences. (Running on oeis4.)