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A326274 as a simple table

n a(n)
0 1
1 4
2 64
3 1920
4 86464
5 5304320
6 418131456
7 40727959552
8 4765747597312
9 655794545577984
10 104360850604687360
11 18948720298674028544
12 3882059495694122090496
13 889053986706845142876160
14 225799026538694916941283328
15 63163063632830911303738982400
16 19344290761718462120859544846336
17 6452149866509553556278434299117568
18 2332867461867950308492384248149311488
19 910538103145382496893587688740637114368
20 382208425560563535419125500691963382333440

[1,4,64,1920,86464,5304320,418131456,40727959552,
 4765747597312,655794545577984,104360850604687360,
 18948720298674028544,3882059495694122090496,
 889053986706845142876160,
 225799026538694916941283328,
 63163063632830911303738982400,
 19344290761718462120859544846336,
 6452149866509553556278434299117568,
 2332867461867950308492384248149311488,
 910538103145382496893587688740637114368,
 382208425560563535419125500691963382333440]

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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)