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A025018 as a simple table

n a(n)
1 4
2 6
3 12
4 30
5 98
6 220
7 308
8 556
9 992
10 2642
11 5372
12 7426
13 43532
14 54244
15 63274
16 113672
17 128168
18 194428
19 194470
20 413572
21 503222
22 1077422
23 3526958
24 3807404
25 10759922
26 24106882
27 27789878
28 37998938
29 60119912
30 113632822
31 187852862
32 335070838

[4,6,12,30,98,220,308,556,992,2642,5372,7426,
 43532,54244,63274,113672,128168,194428,194470,
 413572,503222,1077422,3526958,3807404,10759922,
 24106882,27789878,37998938,60119912,113632822,
 187852862,335070838]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)