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A049680 as a simple table

n a(n)
0 2
1 2
2 5
3 11
4 27
5 67
6 170
7 436
8 1127
9 2927
10 7625
11 19901
12 52002
13 135982
14 355745
15 930931
16 2436527
17 6377807
18 16695530
19 43706576
20 114420627
21 299549527
22 784218605
23 2053091161
24 5375030402
25 14071960442
26 36840786845
27 96450296411

[2,2,5,11,27,67,170,436,1127,2927,7625,19901,
 52002,135982,355745,930931,2436527,6377807,
 16695530,43706576,114420627,299549527,784218605,
 2053091161,5375030402,14071960442,36840786845,
 96450296411]

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Last modified May 19 20:41 EDT 2019. Contains 323410 sequences. (Running on oeis4.)