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A178965 as a simple table

n a(n)
0 0
1 1
2 5
3 15
4 43
5 103
6 263
7 591
8 1391
9 3103
10 7007
11 15039
12 33983
13 72063
14 156543
15 334591
16 722687
17 1510911
18 3255807
19 6773759
20 14433279
21 30193663
22 63535103
23 131264511
24 278589439
25 575004671

[0,1,5,15,43,103,263,591,1391,3103,7007,15039,
 33983,72063,156543,334591,722687,1510911,3255807,
 6773759,14433279,30193663,63535103,131264511,
 278589439,575004671]

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Last modified May 21 15:02 EDT 2019. Contains 323443 sequences. (Running on oeis4.)