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A026745 as a simple table

n a(n)
0 1
1 3
2 7
3 15
4 32
5 66
6 139
7 285
8 599
9 1227
10 2577
11 5277
12 11075
13 22671
14 47543
15 97287
16 203860
17 417006
18 873175
19 1785513
20 3736210
21 7637604
22 15972143
23 32641221
24 68224004
25 139389570
26 291199307
27 594818781
28 1242097912
29 2536656174

[1,3,7,15,32,66,139,285,599,1227,2577,5277,11075,
 22671,47543,97287,203860,417006,873175,1785513,
 3736210,7637604,15972143,32641221,68224004,
 139389570,291199307,594818781,1242097912,
 2536656174]

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Last modified May 25 03:14 EDT 2019. Contains 323539 sequences. (Running on oeis4.)