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.

A305718 a(n) is the smallest number k such that sigma(k + 2n) = sigma(k) - 2n, or -1 if no such number exists.

Table of values

n a(n)
0 1
1 6976
2 15
3 35
4 39
5 51
6 95
7 831
8 45
9 88
10 63
11 222
12 135
13 37888
14 96
15 284
16 117
17 354
18 175
19 84
20 153
21 176
22 3893
23 267
24 210

List of values

[1, 6976, 15, 35, 39, 51, 95, 831, 45, 88, 63, 222, 135, 37888, 96, 284, 117, 354, 175, 84, 153, 176, 3893, 267, 210]