A323748 - cp's OEIS frontend

A323748 Square array read by ascending antidiagonals: the n-th row lists the Zsigmondy numbers for a = n, b = 1, that is, T(n,k) = Zs(k, n, 1) is the greatest divisor of n^k - 1 that is coprime to n^m - 1 for all positive integers m < k, with n >= 2, k >= 1.

n	a(n)
2	1
3	2
4	3
5	3
6	1
7	7
8	4
9	5
10	13
11	5
12	5
13	3
14	7
15	5
16	31
17	6
18	7
19	31
20	17
21	121
22	1
23	7
24	1
25	43
26	13
27	341
28	7
29	127
30	8
31	9
32	19
33	37
34	781
35	13
36	1093
37	17
38	9
39	5
40	73
41	25
42	311
43	7
44	5461
45	41
46	73
47	10
48	11
49	91
50	65
51	2801
52	31
53	19531
54	257
55	757
56	11
57	11
58	3
59	37
60	41
61	4681
62	43
63	55987
64	313
65	1387
66	61
67	2047
68	12
69	13
70	133
71	101
72	7381
73	19
74	137257
75	1297
76	15751
77	41
78	88573
79	13

[1, 2, 3, 3, 1, 7, 4, 5, 13, 5, 5, 3, 7, 5, 31, 6, 7, 31, 17, 121, 1, 7, 1, 43, 13, 341, 7, 127, 8, 9, 19, 37, 781, 13, 1093, 17, 9, 5, 73, 25, 311, 7, 5461, 41, 73, 10, 11, 91, 65, 2801, 31, 19531, 257, 757, 11, 11, 3, 37, 41, 4681, 43, 55987, 313, 1387, 61, 2047, 12, 13, 133, 101, 7381, 19, 137257, 1297, 15751, 41, 88573, 13]

cp's OEIS Frontend

A323748 Square array read by ascending antidiagonals: the n-th row lists the Zsigmondy numbers for a = n, b = 1, that is, T(n,k) = Zs(k, n, 1) is the greatest divisor of n^k - 1 that is coprime to n^m - 1 for all positive integers m < k, with n >= 2, k >= 1.

Table of values

List of values