A047919 - cp's OEIS frontend

A047919 Triangular array read by rows: a(n,k) = Sum_{d|k} mu(d)*U(n,k/d)/n if k|n else 0, where U(n,k) = A047916(n,k) (1<=k<=n).

n	a(n)
1	1
2	1
3	0
4	2
5	0
6	0
7	2
8	0
9	0
10	4
11	4
12	0
13	0
14	0
15	20
16	2
17	4
18	6
19	0
20	0
21	108
22	6
23	0
24	0
25	0
26	0
27	0
28	714
29	4
30	4
31	0
32	40
33	0
34	0
35	0
36	4992
37	6
38	0
39	30
40	0
41	0
42	0
43	0
44	0
45	40284
46	4
47	16
48	0
49	0
50	380
51	0
52	0
53	0
54	0
55	362480
56	10
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	3628790
67	4
68	8
69	60
70	312
71	0
72	3768
73	0
74	0
75	0
76	0

[1, 1, 0, 2, 0, 0, 2, 0, 0, 4, 4, 0, 0, 0, 20, 2, 4, 6, 0, 0, 108, 6, 0, 0, 0, 0, 0, 714, 4, 4, 0, 40, 0, 0, 0, 4992, 6, 0, 30, 0, 0, 0, 0, 0, 40284, 4, 16, 0, 0, 380, 0, 0, 0, 0, 362480, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3628790, 4, 8, 60, 312, 0, 3768, 0, 0, 0, 0]

cp's OEIS Frontend

A047919 Triangular array read by rows: a(n,k) = Sum_{d|k} mu(d)*U(n,k/d)/n if k|n else 0, where U(n,k) = A047916(n,k) (1<=k<=n).

Table of values

List of values