A006886 - cp's OEIS frontend

A006886 Kaprekar numbers: positive numbers n such that n = q+r and n^2 = q*10^m+r, for some m >= 1, q >= 0 and 0 <= r < 10^m, with n != 10^a, a >= 1.

n	a(n)
1	1
2	9
3	45
4	55
5	99
6	297
7	703
8	999
9	2223
10	2728
11	4879
12	4950
13	5050
14	5292
15	7272
16	7777
17	9999
18	17344
19	22222
20	38962
21	77778
22	82656
23	95121
24	99999
25	142857
26	148149
27	181819
28	187110
29	208495
30	318682
31	329967
32	351352
33	356643
34	390313
35	461539
36	466830
37	499500
38	500500
39	533170

[1, 9, 45, 55, 99, 297, 703, 999, 2223, 2728, 4879, 4950, 5050, 5292, 7272, 7777, 9999, 17344, 22222, 38962, 77778, 82656, 95121, 99999, 142857, 148149, 181819, 187110, 208495, 318682, 329967, 351352, 356643, 390313, 461539, 466830, 499500, 500500, 533170]

cp's OEIS Frontend

A006886 Kaprekar numbers: positive numbers n such that n = q+r and n^2 = q*10^m+r, for some m >= 1, q >= 0 and 0 <= r < 10^m, with n != 10^a, a >= 1.

Table of values

List of values