A072502 - cp's OEIS frontend

A072502 Numbers that are run sums (trapezoidal, the difference between two triangular numbers) in exactly 3 ways.

n	a(n)
1	9
2	18
3	25
4	36
5	49
6	50
7	72
8	98
9	100
10	121
11	144
12	169
13	196
14	200
15	242
16	288
17	289
18	338
19	361
20	392
21	400
22	484
23	529
24	576
25	578
26	676
27	722
28	784
29	800
30	841
31	961
32	968
33	1058
34	1152
35	1156
36	1352
37	1369
38	1444
39	1568
40	1600
41	1681
42	1682
43	1849
44	1922
45	1936
46	2116
47	2209
48	2304
49	2312
50	2704

[9, 18, 25, 36, 49, 50, 72, 98, 100, 121, 144, 169, 196, 200, 242, 288, 289, 338, 361, 392, 400, 484, 529, 576, 578, 676, 722, 784, 800, 841, 961, 968, 1058, 1152, 1156, 1352, 1369, 1444, 1568, 1600, 1681, 1682, 1849, 1922, 1936, 2116, 2209, 2304, 2312, 2704]

cp's OEIS Frontend

A072502 Numbers that are run sums (trapezoidal, the difference between two triangular numbers) in exactly 3 ways.

Table of values

List of values