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.

A116297 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+1.

Table of values

n a(n)
1 2
2 5
3 43
4 54
5 38161
6 61836
7 83616
8 346978
9 653019
10 950049
11 8647553
12 9534263
13 8167822281
14 9007920990
15 9209900790
16 9950000499
17 4737445289219
18 4990568257185
19 5009431742812
20 5262554710778
21 8373808925583

List of values

[2, 5, 43, 54, 38161, 61836, 83616, 346978, 653019, 950049, 8647553, 9534263, 8167822281, 9007920990, 9209900790, 9950000499, 4737445289219, 4990568257185, 5009431742812, 5262554710778, 8373808925583]

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

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