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.

A320982 Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of eight.

Table of values

n a(n)
8 0
9 1
10 9
11 2061
12 20736
13 1507293
14 17118482
15 849597609
16 10896848134
17 459634150710
18 6622740258098
19 260269850813548
20 4183025733598532
21 160312786582715100
22 2852747036627655519
23 109305622312149855474
24 2138487419350175956196
25 83104784124134380097202

List of values

[0, 1, 9, 2061, 20736, 1507293, 17118482, 849597609, 10896848134, 459634150710, 6622740258098, 260269850813548, 4183025733598532, 160312786582715100, 2852747036627655519, 109305622312149855474, 2138487419350175956196, 83104784124134380097202]

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

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