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A081225 as a simple table

n a(n)
0 2
1 4
2 6
3 9
4 13
5 20
6 30
7 46
8 69
9 104
10 156
11 235
12 352
13 529
14 793
15 1190
16 1785
17 2678
18 4017
19 6025
20 9038
21 13558
22 20337
23 30506
24 45759
25 68639
26 102959
27 154439
28 231659
29 347488
30 521233
31 781850
32 1172775
33 1759162
34 2638744
35 3958116
36 5937174
37 8905761
38 13358642
39 20037963

[2,4,6,9,13,20,30,46,69,104,156,235,352,529,793,
 1190,1785,2678,4017,6025,9038,13558,20337,30506,
 45759,68639,102959,154439,231659,347488,521233,
 781850,1172775,1759162,2638744,3958116,5937174,
 8905761,13358642,20037963]

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Last modified February 26 17:57 EST 2024. Contains 370352 sequences. (Running on oeis4.)