A175198 - cp's OEIS frontend

A175198 a(n) is the smallest integer k such that the polynomial x^k + 1 over the integers mod 2 has exactly n distinct irreducible factors.

n	a(n)
1	1
2	3
3	7
4	27
5	15
6	21
7	31
8	45
9	73
10	91
11	129
12	85
13	63
14	93
15	105
16	275
17	257
18	219
19	127
20	189
21	217
22	453
23	441
24	357
25	601
26	741
27	273
28	837
29	1191
30	981
31	513
32	645
33	903
34	949
35	255
36	315
37	1649
38	341
39	1103
40	1235
41	455
42	651
43	657
44	1443
45	775
46	2795
47	825
48	1925
49	1911
50	771

[1, 3, 7, 27, 15, 21, 31, 45, 73, 91, 129, 85, 63, 93, 105, 275, 257, 219, 127, 189, 217, 453, 441, 357, 601, 741, 273, 837, 1191, 981, 513, 645, 903, 949, 255, 315, 1649, 341, 1103, 1235, 455, 651, 657, 1443, 775, 2795, 825, 1925, 1911, 771]

cp's OEIS Frontend

A175198 a(n) is the smallest integer k such that the polynomial x^k + 1 over the integers mod 2 has exactly n distinct irreducible factors.

Table of values

List of values