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A137503 as a simple table

n a(n)
2 1
3 0
4 1
5 4
6 3
7 8
8 16
9 28
10 45
11 96
12 167
13 308
14 579
15 1100
16 2018
17 3852
18 7280
19 13776
20 26133
21 49996
22 95223
23 182248
24 349474
25 671176
26 1289925
27 2485644
28 4793355
29 9255700
30 17894421
31 34638296
32 67105714
33 130148812
34 252644985
35 490852972

[1,0,1,4,3,8,16,28,45,96,167,308,579,1100,2018,
 3852,7280,13776,26133,49996,95223,182248,349474,
 671176,1289925,2485644,4793355,9255700,17894421,
 34638296,67105714,130148812,252644985,490852972]

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)