A349489 - cp's OEIS frontend

A349489 a(n) = Sum_{k=1..n} k * floor(sqrt(2*k-1)).

n	a(n)
1	1
2	3
3	9
4	17
5	32
6	50
7	71
8	95
9	131
10	171
11	215
12	263
13	328
14	398
15	473
16	553
17	638
18	728
19	842
20	962
21	1088
22	1220
23	1358
24	1502
25	1677
26	1859
27	2048
28	2244
29	2447
30	2657
31	2874
32	3098
33	3362
34	3634
35	3914
36	4202
37	4498
38	4802
39	5114
40	5434
41	5803
42	6181
43	6568
44	6964
45	7369
46	7783
47	8206
48	8638
49	9079
50	9529
51	10039

[1, 3, 9, 17, 32, 50, 71, 95, 131, 171, 215, 263, 328, 398, 473, 553, 638, 728, 842, 962, 1088, 1220, 1358, 1502, 1677, 1859, 2048, 2244, 2447, 2657, 2874, 3098, 3362, 3634, 3914, 4202, 4498, 4802, 5114, 5434, 5803, 6181, 6568, 6964, 7369, 7783, 8206, 8638, 9079, 9529, 10039]

cp's OEIS Frontend

A349489 a(n) = Sum_{k=1..n} k * floor(sqrt(2*k-1)).

Table of values

List of values