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A123147 as a simple table

n a(n)
0 1
1 6
2 1
3 480
4 2880
5 1
6 21840
7 2882880
8 18162144000
9 40040
10 626400
11 473558400
12 3270820512960000
13 145032891526185062400000
14 380331009246988800000
15 14968800
16 41254012800
17 22288874800832640000
18 17065364402126896882035609600000
19 59861520269419187714435515882890362880000000
20 687565882176828511388211047069939545826918400000000

[1,6,1,480,2880,1,21840,2882880,18162144000,40040,
 626400,473558400,3270820512960000,
 145032891526185062400000,380331009246988800000,
 14968800,41254012800,22288874800832640000,
 17065364402126896882035609600000,
 59861520269419187714435515882890362880000000,
 68756588217682851138821104706993954582691840000000\
 0]

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Last modified May 5 08:57 EDT 2024. Contains 372264 sequences. (Running on oeis4.)