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.

A177477 Number of permutations of 1..n avoiding adjacent step pattern up, down, up.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 19
5 70
6 331
7 1863
8 11637
9 81110
10 635550
11 5495339
12 51590494
13 524043395
14 5743546943
15 67478821537
16 844983073638
17 11240221721390
18 158365579448315
19 2355375055596386
20 36870671943986643
21 606008531691619131
22 10435226671431973345
23 187860338952519968538

List of values

[1, 1, 2, 6, 19, 70, 331, 1863, 11637, 81110, 635550, 5495339, 51590494, 524043395, 5743546943, 67478821537, 844983073638, 11240221721390, 158365579448315, 2355375055596386, 36870671943986643, 606008531691619131, 10435226671431973345, 187860338952519968538]

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

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