A076664 - cp's OEIS frontend

A076664 a(n) = Sum_{k=1..n} antisigma(k), where antisigma(i) = sum of the nondivisors of i that are between 1 and i.

n	a(n)
1	0
2	0
3	2
4	5
5	14
6	23
7	43
8	64
9	96
10	133
11	187
12	237
13	314
14	395
15	491
16	596
17	731
18	863
19	1033
20	1201
21	1400
22	1617
23	1869
24	2109
25	2403
26	2712
27	3050
28	3400
29	3805
30	4198
31	4662
32	5127
33	5640
34	6181
35	6763
36	7338
37	8003
38	8684
39	9408
40	10138
41	10957
42	11764
43	12666
44	13572
45	14529
46	15538

[0, 0, 2, 5, 14, 23, 43, 64, 96, 133, 187, 237, 314, 395, 491, 596, 731, 863, 1033, 1201, 1400, 1617, 1869, 2109, 2403, 2712, 3050, 3400, 3805, 4198, 4662, 5127, 5640, 6181, 6763, 7338, 8003, 8684, 9408, 10138, 10957, 11764, 12666, 13572, 14529, 15538]

cp's OEIS Frontend

A076664 a(n) = Sum_{k=1..n} antisigma(k), where antisigma(i) = sum of the nondivisors of i that are between 1 and i.

Table of values

List of values