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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.

A116227 n times n+4 gives the concatenation of two numbers m and m-9.

Table of values

n a(n)
1 44
2 53
3 949949
4 979652
5 7771781677
6 7900890078
7 9920892098
8 9949999499
9 38773083432315
10 41534158410840
11 47433813119406
12 52566186880591
13 58465841589157
14 61226916567682
15 72258945037433
16 86156896546723

List of values

[44, 53, 949949, 979652, 7771781677, 7900890078, 9920892098, 9949999499, 38773083432315, 41534158410840, 47433813119406, 52566186880591, 58465841589157, 61226916567682, 72258945037433, 86156896546723]

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

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