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A001906 as a simple table

n a(n)
0 0
1 1
2 3
3 8
4 21
5 55
6 144
7 377
8 987
9 2584
10 6765
11 17711
12 46368
13 121393
14 317811
15 832040
16 2178309
17 5702887
18 14930352
19 39088169
20 102334155
21 267914296
22 701408733
23 1836311903
24 4807526976
25 12586269025
26 32951280099
27 86267571272
28 225851433717
29 591286729879
30 1548008755920

[0,1,3,8,21,55,144,377,987,2584,6765,17711,46368,
 121393,317811,832040,2178309,5702887,14930352,
 39088169,102334155,267914296,701408733,1836311903,
 4807526976,12586269025,32951280099,86267571272,
 225851433717,591286729879,1548008755920]

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Last modified May 24 08:05 EDT 2018. Contains 304502 sequences. (Running on oeis4.)