A357529 - cp's OEIS frontend

A357529 Triangular numbers k such that 2*k cannot be expressed as a sum of two distinct triangular numbers.

n	a(n)
1	0
2	1
3	6
4	10
5	15
6	45
7	55
8	66
9	91
10	120
11	136
12	231
13	276
14	300
15	406
16	435
17	496
18	561
19	595
20	630
21	741
22	780
23	820
24	861
25	1081
26	1225
27	1326
28	1431
29	1830
30	2016
31	2080
32	2145
33	2211
34	2415
35	2485
36	2701
37	2850
38	3240
39	3321
40	3486
41	3655
42	3916
43	4005
44	4465
45	4560
46	4950
47	5050
48	5356
49	5460
50	5565

[0, 1, 6, 10, 15, 45, 55, 66, 91, 120, 136, 231, 276, 300, 406, 435, 496, 561, 595, 630, 741, 780, 820, 861, 1081, 1225, 1326, 1431, 1830, 2016, 2080, 2145, 2211, 2415, 2485, 2701, 2850, 3240, 3321, 3486, 3655, 3916, 4005, 4465, 4560, 4950, 5050, 5356, 5460, 5565]

cp's OEIS Frontend

A357529 Triangular numbers k such that 2*k cannot be expressed as a sum of two distinct triangular numbers.

Table of values

List of values