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.

A246226 Number of permutations of [n] with exactly six (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 2340699
16 0
17 0
18 0
19 0
20 0
21 264152543774143518
22 12327936260780536
23 0
24 0
25 0
26 0
27 672873380447205487461117
28 0
29 340824919595050237301116
30 0
31 5490319613423481676641190699
32 0
33 10557477888680231517368491
34 44567941059064479980820469827072
35 21711236330372841724318248158224

List of values

[2340699, 0, 0, 0, 0, 0, 264152543774143518, 12327936260780536, 0, 0, 0, 0, 672873380447205487461117, 0, 340824919595050237301116, 0, 5490319613423481676641190699, 0, 10557477888680231517368491, 44567941059064479980820469827072, 21711236330372841724318248158224]