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A158661 as a simple table

n a(n)
0 4
1 4
2 6
3 24
4 60
5 144
6 360
7 852
8 1968
9 4488
10 10068
11 22272
12 48780
13 105948
14 228588
15 490404
16 1046976
17 2225964
18 4715400
19 9956976
20 20965212
21 44031360
22 92262348
23 192920784
24 402629256
25 838827576
26 1744784388
27 3623814864
28 7516104564

[4,4,6,24,60,144,360,852,1968,4488,10068,22272,
 48780,105948,228588,490404,1046976,2225964,
 4715400,9956976,20965212,44031360,92262348,
 192920784,402629256,838827576,1744784388,
 3623814864,7516104564]

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Last modified September 15 03:44 EDT 2024. Contains 375931 sequences. (Running on oeis4.)