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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.

A269746 Maximal number of 1's in an equilateral triangle of 0's and 1's with n points on each side, the entries being constant on vertical lines, with property that no three 1's form a triangle with sides parallel to the edges of the triangle.

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 8
6 10
7 13
8 16
9 20
10 24
11 28
12 32
13 36
14 40

List of values

[1, 2, 4, 6, 8, 10, 13, 16, 20, 24, 28, 32, 36, 40]

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

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