login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A104064 as a simple table

na(n)
15
2-2
325
4-20
52
6125
7-150
845
9-2
10625
11-1000
12500
13-80
142
153125
16-6250
174375
18-1250
19125
20-2
2115625
22-37500
2333750
24-14000
252625
26-180
272
2878125
29-218750
30240625
31-131250
3236750
33-4900
34245
35-2
36390625
37-1250000
381625000
39-1100000
40412500
41-84000
428400
43-320
442

[5,-2,25,-20,2,125,-150,45,-2,625,-1000,500,-80,2,
 3125,-6250,4375,-1250,125,-2,15625,-37500,33750,
 -14000,2625,-180,2,78125,-218750,240625,-131250,
 36750,-4900,245,-2,390625,-1250000,1625000,
 -1100000,412500,-84000,8400,-320,2]