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A155120 as a simple table

n a(n)
0 -2
1 4
2 26
3 76
4 166
5 308
6 514
7 796
8 1166
9 1636
10 2218
11 2924
12 3766
13 4756
14 5906
15 7228
16 8734
17 10436
18 12346
19 14476
20 16838
21 19444
22 22306
23 25436
24 28846
25 32548
26 36554
27 40876
28 45526
29 50516
30 55858

[-2,4,26,76,166,308,514,796,1166,1636,2218,2924,
 3766,4756,5906,7228,8734,10436,12346,14476,16838,
 19444,22306,25436,28846,32548,36554,40876,45526,
 50516,55858]

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Last modified April 16 12:45 EDT 2021. Contains 343037 sequences. (Running on oeis4.)