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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.

A123328 Let M be the matrix defined in A111490. Sequence gives M(1,1), M(1,2)+M(1,2)+M(2,2), M(1,3)+M(2,3)+M(3,1)+M(3,2)+M(3,3), etc.

Table of values

n a(n)
0 1
1 3
2 5
3 9
4 11
5 19
6 18
7 33
8 28
9 48
10 41
11 70
12 50
13 96
14 69
15 118
16 87
17 152

List of values

[1, 3, 5, 9, 11, 19, 18, 33, 28, 48, 41, 70, 50, 96, 69, 118, 87, 152]

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

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