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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.

A199901 Number of -n..n arrays x(0..5) of 6 elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative.

Table of values

n a(n)
1 75
2 533
3 2035
4 5725
5 13363
6 27457
7 51395
8 89577
9 147547
10 232125
11 351539
12 515557
13 735619
14 1024969
15 1398787
16 1874321
17 2471019
18 3210661
19 4117491
20 5218349
21 6542803
22 8123281
23 9995203
24 12197113
25 14770811
26 17761485
27 21217843
28 25192245
29 29740835

List of values

[75, 533, 2035, 5725, 13363, 27457, 51395, 89577, 147547, 232125, 351539, 515557, 735619, 1024969, 1398787, 1874321, 2471019, 3210661, 4117491, 5218349, 6542803, 8123281, 9995203, 12197113, 14770811, 17761485, 21217843, 25192245, 29740835]

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

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