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.

A200191 Number of -7..7 arrays x(0..n-1) of n elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing.

Table of values

n a(n)
1 1
2 14
3 90
4 688
5 5300
6 41938
7 334278
8 2702398
9 21910764
10 179391752
11 1470318926
12 12138752566
13 100237526220
14 832451175714
15 6911760321744
16 57654489610890
17 480698731253616
18 4023489592590784
19 33656450218770442
20 282477294114249058

List of values

[1, 14, 90, 688, 5300, 41938, 334278, 2702398, 21910764, 179391752, 1470318926, 12138752566, 100237526220, 832451175714, 6911760321744, 57654489610890, 480698731253616, 4023489592590784, 33656450218770442, 282477294114249058]

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

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