A239878 - cp's OEIS frontend

A239878 Numbers k with digit_sum(kk) + 1 = digit_sum((k+1)(k+1)).

n	a(n)
1	0
2	18
3	27
4	36
5	45
6	72
7	81
8	108
9	153
10	198
11	216
12	225
13	243
14	252
15	270
16	297
17	306
18	342
19	369
20	396
21	423
22	441
23	450
24	477
25	486
26	495
27	504
28	513
29	522
30	549
31	558
32	576
33	603
34	630
35	639
36	657
37	693
38	702
39	729
40	747
41	756
42	783
43	801
44	846
45	891
46	918
47	954
48	963
49	972
50	981

[0, 18, 27, 36, 45, 72, 81, 108, 153, 198, 216, 225, 243, 252, 270, 297, 306, 342, 369, 396, 423, 441, 450, 477, 486, 495, 504, 513, 522, 549, 558, 576, 603, 630, 639, 657, 693, 702, 729, 747, 756, 783, 801, 846, 891, 918, 954, 963, 972, 981]

cp's OEIS Frontend

A239878 Numbers k with digit_sum(kk) + 1 = digit_sum((k+1)(k+1)).

Table of values

List of values

n	a(n)
1	0
2	18
3	27
4	36
5	45
6	72
7	81
8	108
9	153
10	198
11	216
12	225
13	243
14	252
15	270
16	297
17	306
18	342
19	369
20	396
21	423
22	441
23	450
24	477
25	486
26	495
27	504
28	513
29	522
30	549
31	558
32	576
33	603
34	630
35	639
36	657
37	693
38	702
39	729
40	747
41	756
42	783
43	801
44	846
45	891
46	918
47	954
48	963
49	972
50	981

n	a(n)
1	0
2	18
3	27
4	36
5	45
6	72
7	81
8	108
9	153
10	198
11	216
12	225
13	243
14	252
15	270
16	297
17	306
18	342
19	369
20	396
21	423
22	441
23	450
24	477
25	486
26	495
27	504
28	513
29	522
30	549
31	558
32	576
33	603
34	630
35	639
36	657
37	693
38	702
39	729
40	747
41	756
42	783
43	801
44	846
45	891
46	918
47	954
48	963
49	972
50	981

cp's OEIS Frontend

A239878 Numbers k with digit_sum(k*k) + 1 = digit_sum((k+1)*(k+1)).

Table of values

List of values

A239878 Numbers k with digit_sum(kk) + 1 = digit_sum((k+1)(k+1)).

n	a(n)
1	0
2	18
3	27
4	36
5	45
6	72
7	81
8	108
9	153
10	198
11	216
12	225
13	243
14	252
15	270
16	297
17	306
18	342
19	369
20	396
21	423
22	441
23	450
24	477
25	486
26	495
27	504
28	513
29	522
30	549
31	558
32	576
33	603
34	630
35	639
36	657
37	693
38	702
39	729
40	747
41	756
42	783
43	801
44	846
45	891
46	918
47	954
48	963
49	972
50	981