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A081756 as a simple table

n a(n)
1 1
2 12
3 56
4 360
5 992
6 2016
7 16256
8 120960
9 131040
10 1571328
11 8714160
12 67100672
13 94279680
14 182131200
15 571963392
16 1379454720
17 4428914688
18 5517818880
19 17179738112
20 70912195200
21 153003540480
22 159991977600
23 175445913600
24 265734881280
25 274877382656
26 612014161920

[1,12,56,360,992,2016,16256,120960,131040,1571328,
 8714160,67100672,94279680,182131200,571963392,
 1379454720,4428914688,5517818880,17179738112,
 70912195200,153003540480,159991977600,
 175445913600,265734881280,274877382656,
 612014161920]

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Last modified April 23 16:28 EDT 2024. Contains 371916 sequences. (Running on oeis4.)