A147846 - cp's OEIS frontend

A147846 Triangular numbers n*(n+1)/2 with n or n+1 prime.

n	a(n)
1	1
2	3
3	6
4	10
5	15
6	21
7	28
8	55
9	66
10	78
11	91
12	136
13	153
14	171
15	190
16	253
17	276
18	406
19	435
20	465
21	496
22	666
23	703
24	820
25	861
26	903
27	946
28	1081
29	1128
30	1378
31	1431
32	1711
33	1770
34	1830
35	1891
36	2211
37	2278
38	2485
39	2556
40	2628
41	2701
42	3081
43	3160
44	3403
45	3486
46	3916
47	4005
48	4656
49	4753
50	5050

[1, 3, 6, 10, 15, 21, 28, 55, 66, 78, 91, 136, 153, 171, 190, 253, 276, 406, 435, 465, 496, 666, 703, 820, 861, 903, 946, 1081, 1128, 1378, 1431, 1711, 1770, 1830, 1891, 2211, 2278, 2485, 2556, 2628, 2701, 3081, 3160, 3403, 3486, 3916, 4005, 4656, 4753, 5050]

cp's OEIS Frontend

A147846 Triangular numbers n*(n+1)/2 with n or n+1 prime.

Table of values

List of values