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A054605 as a simple table

n a(n)
0 0
1 6
2 84
3 780
4 4200
5 15810
6 46956
7 118104
8 262800
9 532350
10 1001220
11 1773156
12 2988024
13 4829370
14 7532700
15 11394480
16 16781856
17 24143094
18 34018740
19 47053500
20 64008840
21 85776306
22 113391564
23 148049160
24 191118000
25 244157550
26 308934756

[0,6,84,780,4200,15810,46956,118104,262800,532350,
 1001220,1773156,2988024,4829370,7532700,11394480,
 16781856,24143094,34018740,47053500,64008840,
 85776306,113391564,148049160,191118000,244157550,
 308934756]

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Last modified October 20 10:00 EDT 2019. Contains 328257 sequences. (Running on oeis4.)