A190661 - cp's OEIS frontend

A190661 a(n) is the least number m such that there are at least n primes in the range (T(k-1), T(k)] for all k >= m, where T(k) is the k-th triangular number.

n	a(n)
0	1
1	7
2	16
3	33
4	52
5	66
6	79
7	72
8	109
9	93
10	121
11	119
12	130
13	153
14	169
15	194
16	180
17	222
18	235
19	275
20	294
21	267
22	256
23	296
24	329
25	339
26	333
27	420
28	383
29	373
30	372
31	454
32	396
33	443
34	449
35	504
36	463
37	574
38	559
39	512
40	592
41	602
42	596
43	541
44	652
45	585
46	683
47	656
48	687
49	689
50	708

[1, 7, 16, 33, 52, 66, 79, 72, 109, 93, 121, 119, 130, 153, 169, 194, 180, 222, 235, 275, 294, 267, 256, 296, 329, 339, 333, 420, 383, 373, 372, 454, 396, 443, 449, 504, 463, 574, 559, 512, 592, 602, 596, 541, 652, 585, 683, 656, 687, 689, 708]

cp's OEIS Frontend

A190661 a(n) is the least number m such that there are at least n primes in the range (T(k-1), T(k)] for all k >= m, where T(k) is the k-th triangular number.

Table of values

List of values

n	a(n)
0	1
1	7
2	16
3	33
4	52
5	66
6	79
7	72
8	109
9	93
10	121
11	119
12	130
13	153
14	169
15	194
16	180
17	222
18	235
19	275
20	294
21	267
22	256
23	296
24	329
25	339
26	333
27	420
28	383
29	373
30	372
31	454
32	396
33	443
34	449
35	504
36	463
37	574
38	559
39	512
40	592
41	602
42	596
43	541
44	652
45	585
46	683
47	656
48	687
49	689
50	708

n	a(n)
0	1
1	7
2	16
3	33
4	52
5	66
6	79
7	72
8	109
9	93
10	121
11	119
12	130
13	153
14	169
15	194
16	180
17	222
18	235
19	275
20	294
21	267
22	256
23	296
24	329
25	339
26	333
27	420
28	383
29	373
30	372
31	454
32	396
33	443
34	449
35	504
36	463
37	574
38	559
39	512
40	592
41	602
42	596
43	541
44	652
45	585
46	683
47	656
48	687
49	689
50	708

n	a(n)
0	1
1	7
2	16
3	33
4	52
5	66
6	79
7	72
8	109
9	93
10	121
11	119
12	130
13	153
14	169
15	194
16	180
17	222
18	235
19	275
20	294
21	267
22	256
23	296
24	329
25	339
26	333
27	420
28	383
29	373
30	372
31	454
32	396
33	443
34	449
35	504
36	463
37	574
38	559
39	512
40	592
41	602
42	596
43	541
44	652
45	585
46	683
47	656
48	687
49	689
50	708