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A017941 as a simple table

n a(n)
0 1
1 3
2 12
3 42
4 144
5 499
6 1728
7 5986
8 20736
9 71832
10 248832
11 861979
12 2985984
13 10343752
14 35831808
15 124125024
16 429981696
17 1489500288
18 5159780352
19 17874003451
20 61917364224
21 214488041413
22 743008370688

[1,3,12,42,144,499,1728,5986,20736,71832,248832,
 861979,2985984,10343752,35831808,124125024,
 429981696,1489500288,5159780352,17874003451,
 61917364224,214488041413,743008370688]

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)