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A337021 as a simple table

n a(n)
0 1
1 6
2 24
3 72
4 168
5 456
6 1032
7 2712
8 5784
9 14640
10 29760
11 71136
12 133344
13 291696
14 479232
15 950880
16 1343088
17 2375808
18 2774832
19 4266240
20 3909792
21 5046672
22 3230400
23 3316704
24 1122000
25 808128
26 0

[1,6,24,72,168,456,1032,2712,5784,14640,29760,
 71136,133344,291696,479232,950880,1343088,2375808,
 2774832,4266240,3909792,5046672,3230400,3316704,
 1122000,808128,0]

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Last modified May 15 04:08 EDT 2024. Contains 372536 sequences. (Running on oeis4.)