A116286 - cp's OEIS frontend

A116286 Numbers k such that k*(k+2) gives the concatenation of a number m with itself.

n	a(n)
1	9
2	99
3	427
4	572
5	726
6	845
7	999
8	7809
9	9999
10	36364
11	63635
12	99999
13	326733
14	673266
15	999999
16	4545453
17	5454546
18	9999999
19	47058822
20	52941177
21	99999999
22	331983806
23	332667333
24	384615385
25	422892897
26	475524476
27	524475523
28	577107102
29	615384614
30	667332666
31	668016193
32	719964245
33	758241757
34	804511279

[9, 99, 427, 572, 726, 845, 999, 7809, 9999, 36364, 63635, 99999, 326733, 673266, 999999, 4545453, 5454546, 9999999, 47058822, 52941177, 99999999, 331983806, 332667333, 384615385, 422892897, 475524476, 524475523, 577107102, 615384614, 667332666, 668016193, 719964245, 758241757, 804511279]

cp's OEIS Frontend

A116286 Numbers k such that k*(k+2) gives the concatenation of a number m with itself.

Table of values

List of values