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A017899 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 0
5 1
6 1
7 1
8 1
9 1
10 2
11 3
12 4
13 5
14 6
15 8
16 11
17 15
18 20
19 26
20 34
21 45
22 60
23 80
24 106
25 140
26 185
27 245
28 325
29 431
30 571
31 756
32 1001
33 1326
34 1757
35 2328
36 3084
37 4085
38 5411
39 7168
40 9496
41 12580
42 16665
43 22076
44 29244
45 38740
46 51320
47 67985
48 90061
49 119305
50 158045
51 209365
52 277350

[1,0,0,0,0,1,1,1,1,1,2,3,4,5,6,8,11,15,20,26,34,
 45,60,80,106,140,185,245,325,431,571,756,1001,
 1326,1757,2328,3084,4085,5411,7168,9496,12580,
 16665,22076,29244,38740,51320,67985,90061,119305,
 158045,209365,277350]

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)