cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A258438 Sum_{i=1..n} Sum_{j=1..n} (i OR j), where OR is the binary logical OR operator.

Table of values

n a(n)
0 0
1 1
2 9
3 24
4 64
5 117
6 189
7 280
8 456
9 657
10 889
11 1152
12 1464
13 1813
14 2205
15 2640
16 3376
17 4161
18 5001
19 5896
20 6864
21 7893
22 8989
23 10152
24 11448
25 12817
26 14265
27 15792
28 17416
29 19125
30 20925
31 22816
32 25824
33 28929
34 32137
35 35448
36 38880
37 42421
38 46077
39 49848
40 53800

List of values

[0, 1, 9, 24, 64, 117, 189, 280, 456, 657, 889, 1152, 1464, 1813, 2205, 2640, 3376, 4161, 5001, 5896, 6864, 7893, 8989, 10152, 11448, 12817, 14265, 15792, 17416, 19125, 20925, 22816, 25824, 28929, 32137, 35448, 38880, 42421, 46077, 49848, 53800]