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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.

A273187 a(n) is the third number in a triple consisting of 3 numbers, which when squared are part of a right diagonal of magic square of squares.

Table of values

n a(n)
0 99
1 449
2 2499
3 14449
4 84099
5 490049
6 2856099
7 16646449
8 97022499
9 565488449
10 3295908099
11 19209960049
12 111963852099
13 652573152449
14 3803475062499
15 22168277222449
16 129206188272099
17 753068852410049
18 4389206926188099
19 25582172704718449
20 149103829302122499

List of values

[99, 449, 2499, 14449, 84099, 490049, 2856099, 16646449, 97022499, 565488449, 3295908099, 19209960049, 111963852099, 652573152449, 3803475062499, 22168277222449, 129206188272099, 753068852410049, 4389206926188099, 25582172704718449, 149103829302122499]

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

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