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A274389 as a simple table

n a(n)
0 1
1 2
2 30
3 948
4 50680
5 4090980
6 463975764
7 70311813880
8 13718193268896
9 3348658563980040
10 999698412743754460
11 358297471515195652308
12 151813934699349280088328
13 75064081768759279536110316
14 42833194538353991390132088540
15 27937122503026656234469859408880
16 20653210428143999114034181337343616
17 17178393944175652034128269331788145680
18 15970217696130529428248774113884778921452
19 16497536217367322285994072192399435877530380
20 18836957575278690757486149667782477659475272520

[1,2,30,948,50680,4090980,463975764,70311813880,
 13718193268896,3348658563980040,
 999698412743754460,358297471515195652308,
 151813934699349280088328,
 75064081768759279536110316,
 42833194538353991390132088540,
 27937122503026656234469859408880,
 20653210428143999114034181337343616,
 17178393944175652034128269331788145680,
 15970217696130529428248774113884778921452,
 16497536217367322285994072192399435877530380,
 18836957575278690757486149667782477659475272520]

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Last modified July 19 02:27 EDT 2024. Contains 374388 sequences. (Running on oeis4.)