A143343 - cp's OEIS frontend

A143343 Triangle T(n,k) (n>=0, 1<=k<=n+1) read by rows: T(n,1)=1 for n>=0, T(1,2)=2. If n>=3 is odd then T(n,k)=1 for all k. If n>=3 is even then if k is prime and k-1 divides n then T(n,k)=k, otherwise T(n,k)=1.

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	3
6	1
7	1
8	1
9	1
10	1
11	2
12	3
13	1
14	5
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	2
23	3
24	1
25	1
26	1
27	7
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	2
38	3
39	1
40	5
41	1
42	1
43	1
44	1
45	1
46	1
47	1
48	1
49	1
50	1
51	1
52	1
53	1
54	1
55	1
56	2
57	3
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	11
66	1
67	1
68	1
69	1
70	1
71	1
72	1
73	1
74	1
75	1
76	1
77	1
78	1
79	2
80	3
81	1
82	5
83	1
84	7
85	1
86	1
87	1
88	1
89	1
90	13
91	1
92	1
93	1
94	1
95	1
96	1
97	1
98	1
99	1
100	1
101	1
102	1
103	1
104	1

[1, 1, 2, 1, 2, 3, 1, 1, 1, 1, 1, 2, 3, 1, 5, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, 1, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 5, 1, 7, 1, 1, 1, 1, 1, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]

cp's OEIS Frontend

A143343 Triangle T(n,k) (n>=0, 1<=k<=n+1) read by rows: T(n,1)=1 for n>=0, T(1,2)=2. If n>=3 is odd then T(n,k)=1 for all k. If n>=3 is even then if k is prime and k-1 divides n then T(n,k)=k, otherwise T(n,k)=1.

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	3
6	1
7	1
8	1
9	1
10	1
11	2
12	3
13	1
14	5
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	2
23	3
24	1
25	1
26	1
27	7
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	2
38	3
39	1
40	5
41	1
42	1
43	1
44	1
45	1
46	1
47	1
48	1
49	1
50	1
51	1
52	1
53	1
54	1
55	1
56	2
57	3
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	11
66	1
67	1
68	1
69	1
70	1
71	1
72	1
73	1
74	1
75	1
76	1
77	1
78	1
79	2
80	3
81	1
82	5
83	1
84	7
85	1
86	1
87	1
88	1
89	1
90	13
91	1
92	1
93	1
94	1
95	1
96	1
97	1
98	1
99	1
100	1
101	1
102	1
103	1
104	1

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	3
6	1
7	1
8	1
9	1
10	1
11	2
12	3
13	1
14	5
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	2
23	3
24	1
25	1
26	1
27	7
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	2
38	3
39	1
40	5
41	1
42	1
43	1
44	1
45	1
46	1
47	1
48	1
49	1
50	1
51	1
52	1
53	1
54	1
55	1
56	2
57	3
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	11
66	1
67	1
68	1
69	1
70	1
71	1
72	1
73	1
74	1
75	1
76	1
77	1
78	1
79	2
80	3
81	1
82	5
83	1
84	7
85	1
86	1
87	1
88	1
89	1
90	13
91	1
92	1
93	1
94	1
95	1
96	1
97	1
98	1
99	1
100	1
101	1
102	1
103	1
104	1

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	3
6	1
7	1
8	1
9	1
10	1
11	2
12	3
13	1
14	5
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	2
23	3
24	1
25	1
26	1
27	7
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	2
38	3
39	1
40	5
41	1
42	1
43	1
44	1
45	1
46	1
47	1
48	1
49	1
50	1
51	1
52	1
53	1
54	1
55	1
56	2
57	3
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	11
66	1
67	1
68	1
69	1
70	1
71	1
72	1
73	1
74	1
75	1
76	1
77	1
78	1
79	2
80	3
81	1
82	5
83	1
84	7
85	1
86	1
87	1
88	1
89	1
90	13
91	1
92	1
93	1
94	1
95	1
96	1
97	1
98	1
99	1
100	1
101	1
102	1
103	1
104	1