A236748 - cp's OEIS frontend

A236748 Positive integers k such that k^2 divided by the digital sum of k is a square.

n	a(n)
1	1
2	4
3	9
4	10
5	18
6	22
7	27
8	36
9	40
10	45
11	54
12	63
13	72
14	81
15	88
16	90
17	100
18	108
19	112
20	117
21	126
22	130
23	135
24	144
25	153
26	162
27	171
28	180
29	196
30	202
31	207
32	216
33	220
34	225
35	234
36	243
37	252
38	261
39	268
40	270
41	306
42	310
43	315
44	324
45	333
46	342
47	351
48	360
49	376
50	400
51	405
52	414
53	423
54	432
55	441

[1, 4, 9, 10, 18, 22, 27, 36, 40, 45, 54, 63, 72, 81, 88, 90, 100, 108, 112, 117, 126, 130, 135, 144, 153, 162, 171, 180, 196, 202, 207, 216, 220, 225, 234, 243, 252, 261, 268, 270, 306, 310, 315, 324, 333, 342, 351, 360, 376, 400, 405, 414, 423, 432, 441]

cp's OEIS Frontend

A236748 Positive integers k such that k^2 divided by the digital sum of k is a square.

Table of values

List of values

n	a(n)
1	1
2	4
3	9
4	10
5	18
6	22
7	27
8	36
9	40
10	45
11	54
12	63
13	72
14	81
15	88
16	90
17	100
18	108
19	112
20	117
21	126
22	130
23	135
24	144
25	153
26	162
27	171
28	180
29	196
30	202
31	207
32	216
33	220
34	225
35	234
36	243
37	252
38	261
39	268
40	270
41	306
42	310
43	315
44	324
45	333
46	342
47	351
48	360
49	376
50	400
51	405
52	414
53	423
54	432
55	441

n	a(n)
1	1
2	4
3	9
4	10
5	18
6	22
7	27
8	36
9	40
10	45
11	54
12	63
13	72
14	81
15	88
16	90
17	100
18	108
19	112
20	117
21	126
22	130
23	135
24	144
25	153
26	162
27	171
28	180
29	196
30	202
31	207
32	216
33	220
34	225
35	234
36	243
37	252
38	261
39	268
40	270
41	306
42	310
43	315
44	324
45	333
46	342
47	351
48	360
49	376
50	400
51	405
52	414
53	423
54	432
55	441

n	a(n)
1	1
2	4
3	9
4	10
5	18
6	22
7	27
8	36
9	40
10	45
11	54
12	63
13	72
14	81
15	88
16	90
17	100
18	108
19	112
20	117
21	126
22	130
23	135
24	144
25	153
26	162
27	171
28	180
29	196
30	202
31	207
32	216
33	220
34	225
35	234
36	243
37	252
38	261
39	268
40	270
41	306
42	310
43	315
44	324
45	333
46	342
47	351
48	360
49	376
50	400
51	405
52	414
53	423
54	432
55	441