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A182780 as a simple table

n a(n)
0 2
1 4
2 8
3 18
4 42
5 100
6 240
7 578
8 1394
9 3364
10 8120
11 19602
12 47322
13 114244
14 275808
15 665858
16 1607522
17 3880900
18 9369320
19 22619538
20 54608394
21 131836324
22 318281040
23 768398402
24 1855077842
25 4478554084
26 10812186008
27 26102926098
28 63018038202
29 152139002500
30 367296043200
31 886731088898
32 2140758220994
33 5168247530884

[2,4,8,18,42,100,240,578,1394,3364,8120,19602,
 47322,114244,275808,665858,1607522,3880900,
 9369320,22619538,54608394,131836324,318281040,
 768398402,1855077842,4478554084,10812186008,
 26102926098,63018038202,152139002500,367296043200,
 886731088898,2140758220994,5168247530884]

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Last modified April 27 09:38 EDT 2024. Contains 372017 sequences. (Running on oeis4.)