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A000073 as a simple table

n a(n)
0 0
1 0
2 1
3 1
4 2
5 4
6 7
7 13
8 24
9 44
10 81
11 149
12 274
13 504
14 927
15 1705
16 3136
17 5768
18 10609
19 19513
20 35890
21 66012
22 121415
23 223317
24 410744
25 755476
26 1389537
27 2555757
28 4700770
29 8646064
30 15902591
31 29249425
32 53798080
33 98950096
34 181997601
35 334745777
36 615693474
37 1132436852

[0,0,1,1,2,4,7,13,24,44,81,149,274,504,927,1705,
 3136,5768,10609,19513,35890,66012,121415,223317,
 410744,755476,1389537,2555757,4700770,8646064,
 15902591,29249425,53798080,98950096,181997601,
 334745777,615693474,1132436852]

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Last modified November 15 08:37 EST 2019. Contains 329144 sequences. (Running on oeis4.)