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A074414 as a simple table

n a(n)
1 1
2 0
3 0
4 6
5 24
6 104
7 432
8 1950
9 8736
10 39298
11 177784
12 813748
13 3755048
14 17438400
15 81380192
16 381468750
17 1795133272
18 8477100632
19 40154790296
20 190735234220
21 908261625600
22 4334883167500
23 20732048658288
24 99341074218100
25 476837158203000
26 2292486335637500

[1,0,0,6,24,104,432,1950,8736,39298,177784,813748,
 3755048,17438400,81380192,381468750,1795133272,
 8477100632,40154790296,190735234220,908261625600,
 4334883167500,20732048658288,99341074218100,
 476837158203000,2292486335637500]

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)