A053816 - cp's OEIS frontend

A053816 Another version of the Kaprekar numbers (A006886): 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 and n an m-digit number.

n	a(n)
1	1
2	9
3	45
4	55
5	99
6	297
7	703
8	999
9	2223
10	2728
11	4950
12	5050
13	7272
14	7777
15	9999
16	17344
17	22222
18	77778
19	82656
20	95121
21	99999
22	142857
23	148149
24	181819
25	187110
26	208495
27	318682
28	329967
29	351352
30	356643
31	390313
32	461539
33	466830
34	499500
35	500500
36	533170
37	538461
38	609687
39	643357

[1, 9, 45, 55, 99, 297, 703, 999, 2223, 2728, 4950, 5050, 7272, 7777, 9999, 17344, 22222, 77778, 82656, 95121, 99999, 142857, 148149, 181819, 187110, 208495, 318682, 329967, 351352, 356643, 390313, 461539, 466830, 499500, 500500, 533170, 538461, 609687, 643357]

cp's OEIS Frontend

A053816 Another version of the Kaprekar numbers (A006886): 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 and n an m-digit number.

Table of values

List of values