A353887 - cp's OEIS frontend

A353887 Squarefree numbers of the form k^2 + k + 1 for some k >= 0.

n	a(n)
1	1
2	3
3	7
4	13
5	21
6	31
7	43
8	57
9	73
10	91
11	111
12	133
13	157
14	183
15	211
16	241
17	273
18	307
19	381
20	421
21	463
22	553
23	601
24	651
25	703
26	757
27	813
28	871
29	993
30	1057
31	1123
32	1191
33	1261
34	1333
35	1407
36	1483
37	1561
38	1641
39	1723
40	1807
41	1893
42	1981
43	2071
44	2163
45	2257
46	2353
47	2451
48	2551
49	2653
50	2757

[1, 3, 7, 13, 21, 31, 43, 57, 73, 91, 111, 133, 157, 183, 211, 241, 273, 307, 381, 421, 463, 553, 601, 651, 703, 757, 813, 871, 993, 1057, 1123, 1191, 1261, 1333, 1407, 1483, 1561, 1641, 1723, 1807, 1893, 1981, 2071, 2163, 2257, 2353, 2451, 2551, 2653, 2757]

cp's OEIS Frontend

A353887 Squarefree numbers of the form k^2 + k + 1 for some k >= 0.

Table of values

List of values