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.

A099632 1-sigma-balanced numbers: numbers n such that (sigma(n-d)+sigma(n+d))/2 = sigma(n) for d=1.

Table of values

n a(n)
1 45
2 694
3 3768374
4 6303735
5 15913725
6 20291271
7 42824146
8 47788894
9 54424095
10 141120134
11 163380694
12 219105494
13 305034794
14 404686557
15 790565966
16 893558445
17 928608435
18 1198745925
19 1251276254
20 1409720194
21 1412229015
22 1696122945

List of values

[45, 694, 3768374, 6303735, 15913725, 20291271, 42824146, 47788894, 54424095, 141120134, 163380694, 219105494, 305034794, 404686557, 790565966, 893558445, 928608435, 1198745925, 1251276254, 1409720194, 1412229015, 1696122945]

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

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