A270143 - cp's OEIS frontend

A270143 a(n) = Sum_{k=0..n} (-1)^(k+1) * k * A000041(n-k).

n	a(n)
0	0
1	1
2	-1
3	3
4	-2
5	6
6	-3
7	11
8	-4
9	19
10	-4
11	31
12	-2
13	50
14	3
15	79
16	15
17	122
18	38
19	187
20	78
21	284
22	146
23	426
24	257
25	635
26	431
27	939
28	701
29	1377
30	1110
31	2007
32	1718
33	2906
34	2613
35	4178
36	3914
37	5971
38	5781
39	8482
40	8440
41	11976
42	12191
43	16816
44	17438
45	23483
46	24730
47	32615
48	34794
49	45070

[0, 1, -1, 3, -2, 6, -3, 11, -4, 19, -4, 31, -2, 50, 3, 79, 15, 122, 38, 187, 78, 284, 146, 426, 257, 635, 431, 939, 701, 1377, 1110, 2007, 1718, 2906, 2613, 4178, 3914, 5971, 5781, 8482, 8440, 11976, 12191, 16816, 17438, 23483, 24730, 32615, 34794, 45070]

cp's OEIS Frontend

A270143 a(n) = Sum_{k=0..n} (-1)^(k+1) * k * A000041(n-k).

Table of values

List of values