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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.

A153363 Number of zig-zag paths from top to bottom of a rectangle of width 9 with n rows whose color is that of the top right corner.

Table of values

n a(n)
1 5
2 8
3 16
4 28
5 56
6 100
7 200
8 360
9 720
10 1300
11 2600
12 4700
13 9400
14 17000
15 34000
16 61500
17 123000
18 222500
19 445000
20 805000
21 1610000
22 2912500
23 5825000
24 10537500
25 21075000
26 38125000
27 76250000
28 137937500
29 275875000
30 499062500
31 998125000
32 1805625000

List of values

[5, 8, 16, 28, 56, 100, 200, 360, 720, 1300, 2600, 4700, 9400, 17000, 34000, 61500, 123000, 222500, 445000, 805000, 1610000, 2912500, 5825000, 10537500, 21075000, 38125000, 76250000, 137937500, 275875000, 499062500, 998125000, 1805625000]

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

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