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”).

A119972 as a simple table

na(n)
11
22
3-3
44
55
6-6
7-7
88
99
1010
11-11
12-12
1313
14-14
15-15
1616
1717
1818
19-19
2020
2121
22-22
23-23
24-24
2525
2626
27-27
28-28
2929
30-30
31-31
3232
3333
3434
35-35
3636
3737
38-38
39-39
4040
4141
4242
43-43
44-44
4545
46-46
47-47
48-48
4949
5050
51-51
5252
5353
54-54
55-55
56-56
5757
5858
59-59
60-60
6161
62-62
63-63
6464
6565
6666
67-67
6868
6969
70-70
71-71
7272
7373
7474
75-75

[1,2,-3,4,5,-6,-7,8,9,10,-11,-12,13,-14,-15,16,17,
 18,-19,20,21,-22,-23,-24,25,26,-27,-28,29,-30,-31,
 32,33,34,-35,36,37,-38,-39,40,41,42,-43,-44,45,
 -46,-47,-48,49,50,-51,52,53,-54,-55,-56,57,58,-59,
 -60,61,-62,-63,64,65,66,-67,68,69,-70,-71,72,73,
 74,-75]