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.

A260842 Sum of lcm(gcd(i,j), gcd(k,l)) for i,j,k,l in range [1..n].

Table of values

n a(n)
1 1
2 23
3 136
4 516
5 1289
6 3271
7 5908
8 11084
9 18833
10 31503
11 44072
12 71156
13 93681
14 133095
15 190052
16 256468
17 311909
18 421619
19 501412
20 664112
21 847013
22 1035763
23 1186208
24 1515000
25 1790625
26 2114575
27 2502268
28 3028600
29 3354613
30 4109163
31 4517824
32 5246624
33 6070201
34 6853807
35 7933304

List of values

[1, 23, 136, 516, 1289, 3271, 5908, 11084, 18833, 31503, 44072, 71156, 93681, 133095, 190052, 256468, 311909, 421619, 501412, 664112, 847013, 1035763, 1186208, 1515000, 1790625, 2114575, 2502268, 3028600, 3354613, 4109163, 4517824, 5246624, 6070201, 6853807, 7933304]