A279910 - cp's OEIS frontend

A279910 a(n) = Sum_{k=1..n} prime(k+1)*floor(n/prime(k+1)).

n	a(n)
1	0
2	0
3	3
4	3
5	8
6	11
7	18
8	18
9	21
10	26
11	37
12	40
13	53
14	60
15	68
16	68
17	85
18	88
19	107
20	112
21	122
22	133
23	156
24	159
25	164
26	177
27	180
28	187
29	216
30	224
31	255
32	255
33	269
34	286
35	298
36	301
37	338
38	357
39	373
40	378
41	419
42	429
43	472
44	483
45	491
46	514
47	561
48	564
49	571
50	576
51	596
52	609
53	662
54	665
55	681
56	688
57	710
58	739
59	798
60	806
61	867
62	898
63	908
64	908
65	926
66	940
67	1007
68	1024
69	1050
70	1062

[0, 0, 3, 3, 8, 11, 18, 18, 21, 26, 37, 40, 53, 60, 68, 68, 85, 88, 107, 112, 122, 133, 156, 159, 164, 177, 180, 187, 216, 224, 255, 255, 269, 286, 298, 301, 338, 357, 373, 378, 419, 429, 472, 483, 491, 514, 561, 564, 571, 576, 596, 609, 662, 665, 681, 688, 710, 739, 798, 806, 867, 898, 908, 908, 926, 940, 1007, 1024, 1050, 1062]

cp's OEIS Frontend

A279910 a(n) = Sum_{k=1..n} prime(k+1)*floor(n/prime(k+1)).

Table of values

List of values