A270144 - cp's OEIS frontend

A270144 a(n) = Sum_{k=0..n} (-1)^(k+1) * k * A000009(n-k).

n	a(n)
0	0
1	1
2	-1
3	2
4	-1
5	2
6	0
7	2
8	1
9	2
10	3
11	2
12	5
13	3
14	7
15	5
16	10
17	7
18	14
19	11
20	18
21	17
22	24
23	24
24	32
25	34
26	42
27	47
28	56
29	63
30	74
31	85
32	96
33	113
34	126
35	147
36	165
37	191
38	213
39	247
40	275
41	316
42	353
43	404
44	449
45	514
46	571
47	648
48	723
49	816
50	909
51	1024
52	1140
53	1278
54	1424
55	1592
56	1770
57	1976
58	2195
59	2442

[0, 1, -1, 2, -1, 2, 0, 2, 1, 2, 3, 2, 5, 3, 7, 5, 10, 7, 14, 11, 18, 17, 24, 24, 32, 34, 42, 47, 56, 63, 74, 85, 96, 113, 126, 147, 165, 191, 213, 247, 275, 316, 353, 404, 449, 514, 571, 648, 723, 816, 909, 1024, 1140, 1278, 1424, 1592, 1770, 1976, 2195, 2442]

cp's OEIS Frontend

A270144 a(n) = Sum_{k=0..n} (-1)^(k+1) * k * A000009(n-k).

Table of values

List of values