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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.

A246229 Number of permutations of [n] with exactly nine (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down.

Table of values

n a(n)
15 571
16 0
17 0
18 0
19 0
20 0
21 0
22 0
23 0
24 0
25 0
26 0
27 0
28 0
29 0
30 0
31 3744763744425692221838464
32 0
33 0
34 0
35 0
36 22782734075857073364773911020731544
37 0
38 0
39 0
40 0
41 0
42 2416100449345559771899241542815463200217246990336
43 0
44 0
45 938240970212978118278669946671983079935585224737310

List of values

[571, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3744763744425692221838464, 0, 0, 0, 0, 22782734075857073364773911020731544, 0, 0, 0, 0, 0, 2416100449345559771899241542815463200217246990336, 0, 0, 938240970212978118278669946671983079935585224737310]

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

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