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.

A097021 Initial terms of chains consisting of five consecutive integers, for neither of which the value of sigma-function is divisible by six.

Table of values

n a(n)
1 211248
2 1146096
3 3948048
4 6090048
5 14590800
6 54100800
7 61051248
8 315758448
9 567777600
10 1715222448
11 1912711248
12 2408874048
13 2636106048
14 2744664048
15 2811450096
16 3304032048
17 4647444048
18 4832821296
19 6020336448
20 6028239600
21 6739372800
22 7824754800
23 10110704400

List of values

[211248, 1146096, 3948048, 6090048, 14590800, 54100800, 61051248, 315758448, 567777600, 1715222448, 1912711248, 2408874048, 2636106048, 2744664048, 2811450096, 3304032048, 4647444048, 4832821296, 6020336448, 6028239600, 6739372800, 7824754800, 10110704400]

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

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