A000801 - cp's OEIS frontend

A000801 a(n) = Sum_{k = 1..n} floor(2^k / k).

n	a(n)
1	2
2	4
3	6
4	10
5	16
6	26
7	44
8	76
9	132
10	234
11	420
12	761
13	1391
14	2561
15	4745
16	8841
17	16551
18	31114
19	58708
20	111136
21	211000
22	401650
23	766372
24	1465422
25	2807599
26	5388709
27	10359735
28	19946715
29	38459505
30	74250899
31	143524565
32	277742293
33	538043341
34	1043333611
35	2025040421

[2, 4, 6, 10, 16, 26, 44, 76, 132, 234, 420, 761, 1391, 2561, 4745, 8841, 16551, 31114, 58708, 111136, 211000, 401650, 766372, 1465422, 2807599, 5388709, 10359735, 19946715, 38459505, 74250899, 143524565, 277742293, 538043341, 1043333611, 2025040421]

cp's OEIS Frontend

A000801 a(n) = Sum_{k = 1..n} floor(2^k / k).

Table of values

List of values