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.

A116275 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m-2.

Table of values

n a(n)
1 8872
2 9009
3 83352840
4 99000099
5 329767122286
6 670232877711
7 738226276371
8 933006600339
9 999000000999
10 3779410975143113
11 3872816717528065
12 4250291784692548
13 4278630943941865
14 4372036686326817
15 4749511753491300
16 5250488246508697
17 5627963313673180
18 5721369056058132

List of values

[8872, 9009, 83352840, 99000099, 329767122286, 670232877711, 738226276371, 933006600339, 999000000999, 3779410975143113, 3872816717528065, 4250291784692548, 4278630943941865, 4372036686326817, 4749511753491300, 5250488246508697, 5627963313673180, 5721369056058132]

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

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