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A024023 as a simple table

n a(n)
0 0
1 2
2 8
3 26
4 80
5 242
6 728
7 2186
8 6560
9 19682
10 59048
11 177146
12 531440
13 1594322
14 4782968
15 14348906
16 43046720
17 129140162
18 387420488
19 1162261466
20 3486784400
21 10460353202
22 31381059608
23 94143178826
24 282429536480
25 847288609442
26 2541865828328
27 7625597484986
28 22876792454960

[0,2,8,26,80,242,728,2186,6560,19682,59048,177146,
 531440,1594322,4782968,14348906,43046720,
 129140162,387420488,1162261466,3486784400,
 10460353202,31381059608,94143178826,282429536480,
 847288609442,2541865828328,7625597484986,
 22876792454960]

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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)