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.

A097020 Initial terms of chains consisting of four consecutive integers, for none of which is the value of sigma-function divisible by six.

Table of values

n a(n)
0 1
1 241
2 576
3 721
4 1249
5 2449
6 12481
7 23761
8 40897
9 65521
10 120049
11 126001
12 128016
13 167041
14 186049
15 211248
16 211249
17 344449
18 374976
19 406801
20 417697
21 451249
22 607201
23 647521
24 665856
25 708049
26 746641
27 766321
28 1039681
29 1068721
30 1092241
31 1146096

List of values

[1, 241, 576, 721, 1249, 2449, 12481, 23761, 40897, 65521, 120049, 126001, 128016, 167041, 186049, 211248, 211249, 344449, 374976, 406801, 417697, 451249, 607201, 647521, 665856, 708049, 746641, 766321, 1039681, 1068721, 1092241, 1146096]

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

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