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A128078 as a simple table

n a(n)
1 1
2 -1
3 4
4 -1
5 -2
6 9
7 -1
8 -2
9 -3
10 16
11 -1
12 -2
13 -3
14 -4
15 25
16 -1
17 -2
18 -3
19 -4
20 -5
21 36
22 -1
23 -2
24 -3
25 -4
26 -5
27 -6
28 49
29 -1
30 -2
31 -3
32 -4
33 -5
34 -6
35 -7
36 64

[1,-1,4,-1,-2,9,-1,-2,-3,16,-1,-2,-3,-4,25,-1,-2,
 -3,-4,-5,36,-1,-2,-3,-4,-5,-6,49,-1,-2,-3,-4,-5,
 -6,-7,64]

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Last modified April 18 16:45 EDT 2019. Contains 322209 sequences. (Running on oeis4.)