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A014140 as a simple table

n a(n)
0 1
1 3
2 7
3 16
4 39
5 104
6 301
7 927
8 2983
9 9901
10 33615
11 116115
12 406627
13 1440039
14 5147891
15 18550588
16 67310955
17 245716112
18 901759969
19 3325067016
20 12312494483
21 45766188970
22 170702447097
23 638698318874
24 2396598337975
25 9016444758528
26 34003644251233
27 128524394659942
28 486793096819011

[1,3,7,16,39,104,301,927,2983,9901,33615,116115,
 406627,1440039,5147891,18550588,67310955,
 245716112,901759969,3325067016,12312494483,
 45766188970,170702447097,638698318874,
 2396598337975,9016444758528,34003644251233,
 128524394659942,486793096819011]

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Last modified October 22 03:51 EDT 2018. Contains 316431 sequences. (Running on oeis4.)