A178218 - cp's OEIS frontend

A178218 Numbers of the form 2k^2-2k+1 or 2k^2-1.

n	a(n)
1	1
2	5
3	7
4	13
5	17
6	25
7	31
8	41
9	49
10	61
11	71
12	85
13	97
14	113
15	127
16	145
17	161
18	181
19	199
20	221
21	241
22	265
23	287
24	313
25	337
26	365
27	391
28	421
29	449
30	481
31	511
32	545
33	577
34	613
35	647
36	685
37	721
38	761
39	799
40	841
41	881
42	925
43	967
44	1013
45	1057
46	1105
47	1151
48	1201
49	1249

[1, 5, 7, 13, 17, 25, 31, 41, 49, 61, 71, 85, 97, 113, 127, 145, 161, 181, 199, 221, 241, 265, 287, 313, 337, 365, 391, 421, 449, 481, 511, 545, 577, 613, 647, 685, 721, 761, 799, 841, 881, 925, 967, 1013, 1057, 1105, 1151, 1201, 1249]

cp's OEIS Frontend

A178218 Numbers of the form 2k^2-2k+1 or 2k^2-1.

Table of values

List of values