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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.

A116197 Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 9.

Table of values

n a(n)
1 25
2 2448207281
3 2552334847
4 9492271895
5 10713024775597019390267617
6 45251510049471045364918031
7 99414584492459886818648287
8 1000584180267191789271991959007645

List of values

[25, 2448207281, 2552334847, 9492271895, 10713024775597019390267617, 45251510049471045364918031, 99414584492459886818648287, 1000584180267191789271991959007645]

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

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