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A278604 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 56
6 728
7 5328
8 27876
9 116304
10 411334
11 1281280
12 3606980
13 9346624
14 22597760
15 51507280
16 111578412
17 231211152
18 460720740
19 886647920
20 1653955415
21 2999760280
22 5303659240
23 9161558720
24 15492338160
25 25689792960
26 41836287690

[0,0,0,1,56,728,5328,27876,116304,411334,1281280,
 3606980,9346624,22597760,51507280,111578412,
 231211152,460720740,886647920,1653955415,
 2999760280,5303659240,9161558720,15492338160,
 25689792960,41836287690]

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Last modified April 16 04:17 EDT 2024. Contains 371696 sequences. (Running on oeis4.)