A383745 - cp's OEIS frontend

A383745 Numbers k of the form x(x+1) whose sum of digits is of the form y(y+1).

n	a(n)
1	0
2	2
3	6
4	20
5	42
6	110
7	132
8	156
9	240
10	420
11	462
12	552
13	600
14	930
15	992
16	1056
17	1122
18	1560
19	1722
20	1892
21	2352
22	2550
23	2756
24	3306
25	3540
26	3782
27	4422
28	4556
29	4970
30	5700
31	5852
32	6006
33	6806
34	7140
35	7832
36	8372
37	8930
38	9120
39	9506
40	10100
41	10302
42	10506
43	10920
44	11130
45	11990
46	12210
47	12432

[0, 2, 6, 20, 42, 110, 132, 156, 240, 420, 462, 552, 600, 930, 992, 1056, 1122, 1560, 1722, 1892, 2352, 2550, 2756, 3306, 3540, 3782, 4422, 4556, 4970, 5700, 5852, 6006, 6806, 7140, 7832, 8372, 8930, 9120, 9506, 10100, 10302, 10506, 10920, 11130, 11990, 12210, 12432]

cp's OEIS Frontend

A383745 Numbers k of the form x(x+1) whose sum of digits is of the form y(y+1).

Table of values

List of values

cp's OEIS Frontend

A383745 Numbers k of the form x*(x+1) whose sum of digits is of the form y*(y+1).

Table of values

List of values

A383745 Numbers k of the form x(x+1) whose sum of digits is of the form y(y+1).