A213999 - cp's OEIS frontend

A213999 Denominators of the triangle of fractions read by rows: pf(n,0) = 1, pf(n,n) = 1/(n+1) and pf(n+1,k) = pf(n,k) + pf(n,k-1) with 0 < k < n; denominators: A213998.

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	3
6	1
7	2
8	6
9	4
10	1
11	2
12	3
13	12
14	5
15	1
16	2
17	6
18	12
19	60
20	6
21	1
22	2
23	3
24	4
25	10
26	20
27	7
28	1
29	2
30	6
31	12
32	20
33	20
34	140
35	8
36	1
37	2
38	3
39	12
40	15
41	10
42	35
43	280
44	9
45	1
46	2
47	6
48	4
49	20
50	30
51	70
52	280
53	2520
54	10
55	1
56	2
57	3
58	12
59	10
60	12
61	21
62	56
63	252
64	2520
65	11
66	1
67	2
68	6
69	12
70	60
71	60
72	84
73	168
74	504
75	2520
76	27720
77	12

[1, 1, 2, 1, 2, 3, 1, 2, 6, 4, 1, 2, 3, 12, 5, 1, 2, 6, 12, 60, 6, 1, 2, 3, 4, 10, 20, 7, 1, 2, 6, 12, 20, 20, 140, 8, 1, 2, 3, 12, 15, 10, 35, 280, 9, 1, 2, 6, 4, 20, 30, 70, 280, 2520, 10, 1, 2, 3, 12, 10, 12, 21, 56, 252, 2520, 11, 1, 2, 6, 12, 60, 60, 84, 168, 504, 2520, 27720, 12]

cp's OEIS Frontend

A213999 Denominators of the triangle of fractions read by rows: pf(n,0) = 1, pf(n,n) = 1/(n+1) and pf(n+1,k) = pf(n,k) + pf(n,k-1) with 0 < k < n; denominators: A213998.

Table of values

List of values