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.

A177529 Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, up, down, up.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 659
7 4186
8 31457
9 264834
10 2465550
11 25334981
12 283322383
13 3430384284
14 44803783445
15 626719448981
16 9347396890481
17 148174002240074
18 2486833885400060
19 44052337160572208
20 821495697573151302
21 16085109561896603059
22 329939476998354570978

List of values

[1, 1, 2, 6, 24, 120, 659, 4186, 31457, 264834, 2465550, 25334981, 283322383, 3430384284, 44803783445, 626719448981, 9347396890481, 148174002240074, 2486833885400060, 44052337160572208, 821495697573151302, 16085109561896603059, 329939476998354570978]

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

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