A089982 - cp's OEIS frontend

A089982 Triangular numbers that can be expressed as the sum of 2 positive triangular numbers.

n	a(n)
1	6
2	21
3	36
4	55
5	66
6	91
7	120
8	136
9	171
10	210
11	231
12	276
13	351
14	378
15	406
16	496
17	561
18	666
19	703
20	741
21	820
22	861
23	946
24	990
25	1035
26	1081
27	1176
28	1225
29	1326
30	1378
31	1431
32	1485
33	1540
34	1596
35	1653
36	1711
37	1770
38	1891
39	1953
40	2016
41	2080
42	2211
43	2278
44	2346
45	2556
46	2701
47	2775
48	2850

[6, 21, 36, 55, 66, 91, 120, 136, 171, 210, 231, 276, 351, 378, 406, 496, 561, 666, 703, 741, 820, 861, 946, 990, 1035, 1081, 1176, 1225, 1326, 1378, 1431, 1485, 1540, 1596, 1653, 1711, 1770, 1891, 1953, 2016, 2080, 2211, 2278, 2346, 2556, 2701, 2775, 2850]

cp's OEIS Frontend

A089982 Triangular numbers that can be expressed as the sum of 2 positive triangular numbers.

Table of values

List of values