A222548 - cp's OEIS frontend

A222548 a(n) = Sum_{k=1..n} floor(n/k)^2.

n	a(n)
1	1
2	5
3	11
4	22
5	32
6	52
7	66
8	92
9	115
10	147
11	169
12	219
13	245
14	289
15	333
16	390
17	424
18	496
19	534
20	612
21	672
22	740
23	786
24	898
25	957
26	1037
27	1113
28	1219
29	1277
30	1413
31	1475
32	1595
33	1687
34	1791
35	1883
36	2056
37	2130
38	2246
39	2354
40	2526
41	2608
42	2792
43	2878
44	3040
45	3190
46	3330
47	3424
48	3662
49	3773

[1, 5, 11, 22, 32, 52, 66, 92, 115, 147, 169, 219, 245, 289, 333, 390, 424, 496, 534, 612, 672, 740, 786, 898, 957, 1037, 1113, 1219, 1277, 1413, 1475, 1595, 1687, 1791, 1883, 2056, 2130, 2246, 2354, 2526, 2608, 2792, 2878, 3040, 3190, 3330, 3424, 3662, 3773]

cp's OEIS Frontend

A222548 a(n) = Sum_{k=1..n} floor(n/k)^2.

Table of values

List of values