A065384 - cp's OEIS frontend

A065384 Largest prime <= n * (n + 1) / 2.

n	a(n)
2	3
3	5
4	7
5	13
6	19
7	23
8	31
9	43
10	53
11	61
12	73
13	89
14	103
15	113
16	131
17	151
18	167
19	181
20	199
21	229
22	251
23	271
24	293
25	317
26	349
27	373
28	401
29	433
30	463
31	491
32	523
33	557
34	593
35	619
36	661
37	701
38	739
39	773
40	811
41	859
42	887
43	941
44	983
45	1033
46	1069
47	1123
48	1171
49	1223
50	1259
51	1321
52	1373
53	1429
54	1483

[3, 5, 7, 13, 19, 23, 31, 43, 53, 61, 73, 89, 103, 113, 131, 151, 167, 181, 199, 229, 251, 271, 293, 317, 349, 373, 401, 433, 463, 491, 523, 557, 593, 619, 661, 701, 739, 773, 811, 859, 887, 941, 983, 1033, 1069, 1123, 1171, 1223, 1259, 1321, 1373, 1429, 1483]

cp's OEIS Frontend

A065384 Largest prime <= n * (n + 1) / 2.

Table of values

List of values