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.

A320980 Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of six.

Table of values

n a(n)
6 0
7 1
8 7
9 514
10 4189
11 154261
12 1477381
13 44169020
14 493190771
15 13821362271
16 177705152975
17 4949371839867
18 72355179873697
19 2058206624313873
20 33818827542140211
21 995975339452380880
22 18206096557050382759
23 558929622195992201388
24 11264684856271486133087

List of values

[0, 1, 7, 514, 4189, 154261, 1477381, 44169020, 493190771, 13821362271, 177705152975, 4949371839867, 72355179873697, 2058206624313873, 33818827542140211, 995975339452380880, 18206096557050382759, 558929622195992201388, 11264684856271486133087]

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

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