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A135254 as a simple table

n a(n)
0 0
1 0
2 1
3 4
4 12
5 33
6 90
7 252
8 729
9 2160
10 6480
11 19521
12 58806
13 176904
14 531441
15 1595052
16 4785156
17 14353281
18 43053282
19 129146724
20 387420489
21 1162241784
22 3486725352
23 10460235105
24 31380882462
25 94143001680
26 282429536481
27 847289140884

[0,0,1,4,12,33,90,252,729,2160,6480,19521,58806,
 176904,531441,1595052,4785156,14353281,43053282,
 129146724,387420489,1162241784,3486725352,
 10460235105,31380882462,94143001680,282429536481,
 847289140884]

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Last modified June 4 05:52 EDT 2024. Contains 373089 sequences. (Running on oeis4.)