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.

A153372 Number of zig-zag paths from top to bottom of a rectangle of width 11 with 2n-1 rows whose color is that of the top right corner.

Table of values

n a(n)
1 6
2 20
3 72
4 264
5 976
6 3624
7 13488
8 50264
9 187440
10 699240
11 2609008
12 9735768
13 36332016
14 135588200
15 506012592
16 1888445784
17 7047737776
18 26302439784
19 98161890288
20 366344859224
21 1367217022320
22 5102522181480
23 19042869606448

List of values

[6, 20, 72, 264, 976, 3624, 13488, 50264, 187440, 699240, 2609008, 9735768, 36332016, 135588200, 506012592, 1888445784, 7047737776, 26302439784, 98161890288, 366344859224, 1367217022320, 5102522181480, 19042869606448]

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

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