A087787 - cp's OEIS frontend

A087787 a(n) = Sum_{k=0..n} (-1)^(n-k)*A000041(k).

n	a(n)
0	1
1	0
2	2
3	1
4	4
5	3
6	8
7	7
8	15
9	15
10	27
11	29
12	48
13	53
14	82
15	94
16	137
17	160
18	225
19	265
20	362
21	430
22	572
23	683
24	892
25	1066
26	1370
27	1640
28	2078
29	2487
30	3117
31	3725
32	4624
33	5519
34	6791
35	8092
36	9885
37	11752
38	14263
39	16922
40	20416
41	24167
42	29007
43	34254
44	40921
45	48213
46	57345
47	67409

[1, 0, 2, 1, 4, 3, 8, 7, 15, 15, 27, 29, 48, 53, 82, 94, 137, 160, 225, 265, 362, 430, 572, 683, 892, 1066, 1370, 1640, 2078, 2487, 3117, 3725, 4624, 5519, 6791, 8092, 9885, 11752, 14263, 16922, 20416, 24167, 29007, 34254, 40921, 48213, 57345, 67409]

cp's OEIS Frontend

A087787 a(n) = Sum_{k=0..n} (-1)^(n-k)*A000041(k).

Table of values

List of values