A144291 - cp's OEIS frontend

A144291 Triangular numbers n*(n-1)/2 with n and n -1 nonprime.

n	a(n)
1	0
2	36
3	45
4	105
5	120
6	210
7	231
8	300
9	325
10	351
11	378
12	528
13	561
14	595
15	630
16	741
17	780
18	990
19	1035
20	1176
21	1225
22	1275
23	1326
24	1485
25	1540
26	1596
27	1653
28	1953
29	2016
30	2080
31	2145
32	2346
33	2415
34	2775
35	2850
36	2926
37	3003
38	3240
39	3321
40	3570
41	3655
42	3741
43	3828
44	4095
45	4186
46	4278

[0, 36, 45, 105, 120, 210, 231, 300, 325, 351, 378, 528, 561, 595, 630, 741, 780, 990, 1035, 1176, 1225, 1275, 1326, 1485, 1540, 1596, 1653, 1953, 2016, 2080, 2145, 2346, 2415, 2775, 2850, 2926, 3003, 3240, 3321, 3570, 3655, 3741, 3828, 4095, 4186, 4278]

cp's OEIS Frontend

A144291 Triangular numbers n*(n-1)/2 with n and n -1 nonprime.

Table of values

List of values