A116589 - cp's OEIS frontend

A116589 a(n) = Sum{sqrt(n) < i <= n} i - Sum{1 <= i < sqrt(n)} i.

n	a(n)
1	0
2	1
3	4
4	6
5	9
6	15
7	22
8	30
9	36
10	43
11	54
12	66
13	79
14	93
15	108
16	120
17	133
18	151
19	170
20	190
21	211
22	233
23	256
24	280
25	300
26	321
27	348
28	376
29	405
30	435
31	466
32	498
33	531
34	565
35	600
36	630
37	661
38	699
39	738
40	778
41	819
42	861
43	904
44	948
45	993
46	1039
47	1086
48	1134
49	1176
50	1219
51	1270
52	1322
53	1375
54	1429
55	1484
56	1540

[0, 1, 4, 6, 9, 15, 22, 30, 36, 43, 54, 66, 79, 93, 108, 120, 133, 151, 170, 190, 211, 233, 256, 280, 300, 321, 348, 376, 405, 435, 466, 498, 531, 565, 600, 630, 661, 699, 738, 778, 819, 861, 904, 948, 993, 1039, 1086, 1134, 1176, 1219, 1270, 1322, 1375, 1429, 1484, 1540]

cp's OEIS Frontend

A116589 a(n) = Sum{sqrt(n) < i <= n} i - Sum{1 <= i < sqrt(n)} i.

Table of values

List of values