A046581 - cp's OEIS frontend

A046581 First numerator and then denominator of each element of the 1/4-Pascal triangle (by row), excluding 4's.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	5
15	5
16	1
17	1
18	1
19	1
20	9
21	5
22	2
23	9
24	1
25	1
26	1
27	1
28	13
29	19
30	19
31	13
32	1
33	1
34	1
35	1
36	17
37	8
38	1
39	19
40	2
41	8
42	1
43	17
44	1
45	1
46	1
47	1
48	21
49	49
50	35
51	2
52	35
53	2
54	49
55	21
56	1
57	1
58	1
59	1
60	25
61	35
62	2
63	119
64	35
65	1
66	119
67	35
68	2
69	25
70	1
71	1
72	1
73	1
74	29

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 1, 1, 1, 1, 9, 5, 2, 9, 1, 1, 1, 1, 13, 19, 19, 13, 1, 1, 1, 1, 17, 8, 1, 19, 2, 8, 1, 17, 1, 1, 1, 1, 21, 49, 35, 2, 35, 2, 49, 21, 1, 1, 1, 1, 25, 35, 2, 119, 35, 1, 119, 35, 2, 25, 1, 1, 1, 1, 29]

cp's OEIS Frontend

A046581 First numerator and then denominator of each element of the 1/4-Pascal triangle (by row), excluding 4's.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	5
15	5
16	1
17	1
18	1
19	1
20	9
21	5
22	2
23	9
24	1
25	1
26	1
27	1
28	13
29	19
30	19
31	13
32	1
33	1
34	1
35	1
36	17
37	8
38	1
39	19
40	2
41	8
42	1
43	17
44	1
45	1
46	1
47	1
48	21
49	49
50	35
51	2
52	35
53	2
54	49
55	21
56	1
57	1
58	1
59	1
60	25
61	35
62	2
63	119
64	35
65	1
66	119
67	35
68	2
69	25
70	1
71	1
72	1
73	1
74	29

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	5
15	5
16	1
17	1
18	1
19	1
20	9
21	5
22	2
23	9
24	1
25	1
26	1
27	1
28	13
29	19
30	19
31	13
32	1
33	1
34	1
35	1
36	17
37	8
38	1
39	19
40	2
41	8
42	1
43	17
44	1
45	1
46	1
47	1
48	21
49	49
50	35
51	2
52	35
53	2
54	49
55	21
56	1
57	1
58	1
59	1
60	25
61	35
62	2
63	119
64	35
65	1
66	119
67	35
68	2
69	25
70	1
71	1
72	1
73	1
74	29

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	1
14	5
15	5
16	1
17	1
18	1
19	1
20	9
21	5
22	2
23	9
24	1
25	1
26	1
27	1
28	13
29	19
30	19
31	13
32	1
33	1
34	1
35	1
36	17
37	8
38	1
39	19
40	2
41	8
42	1
43	17
44	1
45	1
46	1
47	1
48	21
49	49
50	35
51	2
52	35
53	2
54	49
55	21
56	1
57	1
58	1
59	1
60	25
61	35
62	2
63	119
64	35
65	1
66	119
67	35
68	2
69	25
70	1
71	1
72	1
73	1
74	29