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A317404 as a simple table

n a(n)
0 0
1 3
2 18
3 63
4 180
5 465
6 1134
7 2667
8 6120
9 13797
10 30690
11 67551
12 147420
13 319449
14 688086
15 1474515
16 3145680
17 6684621
18 14155722
19 29884359
20 62914500
21 132120513
22 276823998
23 578813883
24 1207959480
25 2516582325
26 5234491314
27 10871635887
28 22548578220
29 46707769257
30 96636764070

[0,3,18,63,180,465,1134,2667,6120,13797,30690,
 67551,147420,319449,688086,1474515,3145680,
 6684621,14155722,29884359,62914500,132120513,
 276823998,578813883,1207959480,2516582325,
 5234491314,10871635887,22548578220,46707769257,
 96636764070]

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)