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.

A271020 Magic sums of 3 X 3 semimagic squares of triangular numbers whose rows, columns, and at least one of the two main diagonals sum to the same number.

Table of values

n a(n)
1 49288842
2 62620221
3 116153046
4 128221941
5 132479727
6 443599581
7 563581992
8 750128651
9 1045377417
10 1153997472
11 1192317546
12 1232221059
13 1565505534
14 1881096741
15 2192812511
16 2415153276
17 2903826159
18 3068390847
19 3205548534
20 3311993184
21 3647394275
22 3992396232

List of values

[49288842, 62620221, 116153046, 128221941, 132479727, 443599581, 563581992, 750128651, 1045377417, 1153997472, 1192317546, 1232221059, 1565505534, 1881096741, 2192812511, 2415153276, 2903826159, 3068390847, 3205548534, 3311993184, 3647394275, 3992396232]

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

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