A047918 - cp's OEIS frontend

A047918 Triangular array read by rows: a(n,k) = Sum_{d|k} mu(d)*U(n,k/d) if k|n else 0, where U(n,k) = A047916(n,k) (1<=k<=n).

n	a(n)
1	1
2	2
3	0
4	6
5	0
6	0
7	8
8	0
9	0
10	16
11	20
12	0
13	0
14	0
15	100
16	12
17	24
18	36
19	0
20	0
21	648
22	42
23	0
24	0
25	0
26	0
27	0
28	4998
29	32
30	32
31	0
32	320
33	0
34	0
35	0
36	39936
37	54
38	0
39	270
40	0
41	0
42	0
43	0
44	0
45	362556
46	40
47	160
48	0
49	0
50	3800
51	0
52	0
53	0
54	0
55	3624800
56	110
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	39916690
67	48
68	96

[1, 2, 0, 6, 0, 0, 8, 0, 0, 16, 20, 0, 0, 0, 100, 12, 24, 36, 0, 0, 648, 42, 0, 0, 0, 0, 0, 4998, 32, 32, 0, 320, 0, 0, 0, 39936, 54, 0, 270, 0, 0, 0, 0, 0, 362556, 40, 160, 0, 0, 3800, 0, 0, 0, 0, 3624800, 110, 0, 0, 0, 0, 0, 0, 0, 0, 0, 39916690, 48, 96]

cp's OEIS Frontend

A047918 Triangular array read by rows: a(n,k) = Sum_{d|k} mu(d)*U(n,k/d) if k|n else 0, where U(n,k) = A047916(n,k) (1<=k<=n).

Table of values

List of values