A185980 - cp's OEIS frontend

A185980 Nontriangular numbers that are the sum of two (positive) triangular numbers in more than one way.

n	a(n)
1	16
2	31
3	42
4	46
5	51
6	56
7	72
8	76
9	81
10	94
11	106
12	111
13	121
14	123
15	126
16	133
17	141
18	146
19	156
20	157
21	172
22	174
23	181
24	186
25	191
26	196
27	198
28	211
29	216
30	225
31	226
32	237
33	241
34	246
35	256
36	259
37	268
38	281
39	286
40	289
41	291
42	297
43	301
44	306
45	310
46	315
47	321
48	326
49	328
50	331
51	336
52	342
53	346
54	354

[16, 31, 42, 46, 51, 56, 72, 76, 81, 94, 106, 111, 121, 123, 126, 133, 141, 146, 156, 157, 172, 174, 181, 186, 191, 196, 198, 211, 216, 225, 226, 237, 241, 246, 256, 259, 268, 281, 286, 289, 291, 297, 301, 306, 310, 315, 321, 326, 328, 331, 336, 342, 346, 354]

cp's OEIS Frontend

A185980 Nontriangular numbers that are the sum of two (positive) triangular numbers in more than one way.

Table of values

List of values

n	a(n)
1	16
2	31
3	42
4	46
5	51
6	56
7	72
8	76
9	81
10	94
11	106
12	111
13	121
14	123
15	126
16	133
17	141
18	146
19	156
20	157
21	172
22	174
23	181
24	186
25	191
26	196
27	198
28	211
29	216
30	225
31	226
32	237
33	241
34	246
35	256
36	259
37	268
38	281
39	286
40	289
41	291
42	297
43	301
44	306
45	310
46	315
47	321
48	326
49	328
50	331
51	336
52	342
53	346
54	354

n	a(n)
1	16
2	31
3	42
4	46
5	51
6	56
7	72
8	76
9	81
10	94
11	106
12	111
13	121
14	123
15	126
16	133
17	141
18	146
19	156
20	157
21	172
22	174
23	181
24	186
25	191
26	196
27	198
28	211
29	216
30	225
31	226
32	237
33	241
34	246
35	256
36	259
37	268
38	281
39	286
40	289
41	291
42	297
43	301
44	306
45	310
46	315
47	321
48	326
49	328
50	331
51	336
52	342
53	346
54	354

n	a(n)
1	16
2	31
3	42
4	46
5	51
6	56
7	72
8	76
9	81
10	94
11	106
12	111
13	121
14	123
15	126
16	133
17	141
18	146
19	156
20	157
21	172
22	174
23	181
24	186
25	191
26	196
27	198
28	211
29	216
30	225
31	226
32	237
33	241
34	246
35	256
36	259
37	268
38	281
39	286
40	289
41	291
42	297
43	301
44	306
45	310
46	315
47	321
48	326
49	328
50	331
51	336
52	342
53	346
54	354