A344816 - cp's OEIS frontend

A344816 a(n) = Sum_{k=1..n} floor(n/k) * 5^(k-1).

n	a(n)
1	1
2	7
3	33
4	164
5	790
6	3946
7	19572
8	97828
9	488479
10	2442235
11	12207861
12	61039267
13	305179893
14	1525898649
15	7629414925
16	38147071306
17	190734961932
18	953674808838
19	4768372074464
20	23841860356470
21	119209292012746
22	596046459981502
23	2980232250997128
24	14901161254984784

[1, 7, 33, 164, 790, 3946, 19572, 97828, 488479, 2442235, 12207861, 61039267, 305179893, 1525898649, 7629414925, 38147071306, 190734961932, 953674808838, 4768372074464, 23841860356470, 119209292012746, 596046459981502, 2980232250997128, 14901161254984784]

cp's OEIS Frontend

A344816 a(n) = Sum_{k=1..n} floor(n/k) * 5^(k-1).

Table of values

List of values