A361128 - cp's OEIS frontend

A361128 Let b = A360519; let Lg = gcd(b(n-1),b(n)), Rg = gcd(b(n),b(n+1)); let L(n) = prod_{primes p|Lg} p-part of b(n), R(n) = prod_{primes p|Rg} p-part of b(n), M(n) = b(n)/(L(n)*R(n)); sequence gives L(n).

n	a(n)
2	1
3	2
4	5
5	7
6	3
7	4
8	5
9	11
10	9
11	2
12	7
13	11
14	3
15	5
16	2
17	11
18	13
19	3
20	4
21	7
22	13
23	5
24	2
25	17
26	7
27	9
28	2
29	13
30	17
31	3
32	2
33	19
34	5
35	3
36	4
37	11
38	17
39	25
40	2
41	23
42	3
43	19
44	4
45	13
46	3
47	5
48	2
49	29
50	3
51	31
52	8
53	7
54	3
55	37
56	4
57	17
58	3
59	41
60	16
61	5
62	23
63	7
64	12
65	5
66	29
67	49
68	2
69	3
70	43
71	25
72	2
73	3
74	47
75	5
76	8
77	3
78	7
79	19
80	2
81	27
82	5
83	31

[1, 2, 5, 7, 3, 4, 5, 11, 9, 2, 7, 11, 3, 5, 2, 11, 13, 3, 4, 7, 13, 5, 2, 17, 7, 9, 2, 13, 17, 3, 2, 19, 5, 3, 4, 11, 17, 25, 2, 23, 3, 19, 4, 13, 3, 5, 2, 29, 3, 31, 8, 7, 3, 37, 4, 17, 3, 41, 16, 5, 23, 7, 12, 5, 29, 49, 2, 3, 43, 25, 2, 3, 47, 5, 8, 3, 7, 19, 2, 27, 5, 31]

cp's OEIS Frontend

A361128 Let b = A360519; let Lg = gcd(b(n-1),b(n)), Rg = gcd(b(n),b(n+1)); let L(n) = prod_{primes p|Lg} p-part of b(n), R(n) = prod_{primes p|Rg} p-part of b(n), M(n) = b(n)/(L(n)*R(n)); sequence gives L(n).

Table of values

List of values

n	a(n)
2	1
3	2
4	5
5	7
6	3
7	4
8	5
9	11
10	9
11	2
12	7
13	11
14	3
15	5
16	2
17	11
18	13
19	3
20	4
21	7
22	13
23	5
24	2
25	17
26	7
27	9
28	2
29	13
30	17
31	3
32	2
33	19
34	5
35	3
36	4
37	11
38	17
39	25
40	2
41	23
42	3
43	19
44	4
45	13
46	3
47	5
48	2
49	29
50	3
51	31
52	8
53	7
54	3
55	37
56	4
57	17
58	3
59	41
60	16
61	5
62	23
63	7
64	12
65	5
66	29
67	49
68	2
69	3
70	43
71	25
72	2
73	3
74	47
75	5
76	8
77	3
78	7
79	19
80	2
81	27
82	5
83	31

n	a(n)
2	1
3	2
4	5
5	7
6	3
7	4
8	5
9	11
10	9
11	2
12	7
13	11
14	3
15	5
16	2
17	11
18	13
19	3
20	4
21	7
22	13
23	5
24	2
25	17
26	7
27	9
28	2
29	13
30	17
31	3
32	2
33	19
34	5
35	3
36	4
37	11
38	17
39	25
40	2
41	23
42	3
43	19
44	4
45	13
46	3
47	5
48	2
49	29
50	3
51	31
52	8
53	7
54	3
55	37
56	4
57	17
58	3
59	41
60	16
61	5
62	23
63	7
64	12
65	5
66	29
67	49
68	2
69	3
70	43
71	25
72	2
73	3
74	47
75	5
76	8
77	3
78	7
79	19
80	2
81	27
82	5
83	31

n	a(n)
2	1
3	2
4	5
5	7
6	3
7	4
8	5
9	11
10	9
11	2
12	7
13	11
14	3
15	5
16	2
17	11
18	13
19	3
20	4
21	7
22	13
23	5
24	2
25	17
26	7
27	9
28	2
29	13
30	17
31	3
32	2
33	19
34	5
35	3
36	4
37	11
38	17
39	25
40	2
41	23
42	3
43	19
44	4
45	13
46	3
47	5
48	2
49	29
50	3
51	31
52	8
53	7
54	3
55	37
56	4
57	17
58	3
59	41
60	16
61	5
62	23
63	7
64	12
65	5
66	29
67	49
68	2
69	3
70	43
71	25
72	2
73	3
74	47
75	5
76	8
77	3
78	7
79	19
80	2
81	27
82	5
83	31