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A002478 as a simple table

n a(n)
0 1
1 1
2 3
3 6
4 13
5 28
6 60
7 129
8 277
9 595
10 1278
11 2745
12 5896
13 12664
14 27201
15 58425
16 125491
17 269542
18 578949
19 1243524
20 2670964
21 5736961
22 12322413
23 26467299
24 56849086
25 122106097
26 262271568
27 563332848
28 1209982081
29 2598919345
30 5582216355
31 11990037126
32 25753389181

[1,1,3,6,13,28,60,129,277,595,1278,2745,5896,
 12664,27201,58425,125491,269542,578949,1243524,
 2670964,5736961,12322413,26467299,56849086,
 122106097,262271568,563332848,1209982081,
 2598919345,5582216355,11990037126,25753389181]

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Last modified February 20 23:24 EST 2019. Contains 320362 sequences. (Running on oeis4.)