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.

A303480 Numbers k such that the average of squarefree kernels of all positive integers <= k is an integer.

Table of values

n a(n)
1 1
2 3
3 4
4 17
5 53
6 433
7 456
8 901
9 1052
10 4011
11 14504
12 15111
13 156408
14 245423
15 328408
16 911340
17 2263141
18 13736475
19 20092485
20 37903271
21 60003559
22 78733423
23 84206981
24 234095587
25 319691535
26 986119609
27 1488787296
28 6139123252
29 8663152552
30 11909530004
31 19226378456
32 65827587400

List of values

[1, 3, 4, 17, 53, 433, 456, 901, 1052, 4011, 14504, 15111, 156408, 245423, 328408, 911340, 2263141, 13736475, 20092485, 37903271, 60003559, 78733423, 84206981, 234095587, 319691535, 986119609, 1488787296, 6139123252, 8663152552, 11909530004, 19226378456, 65827587400]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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