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.

A320979 Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of five.

Table of values

n a(n)
5 0
6 1
7 6
8 254
9 1835
10 47673
11 416221
12 9565156
13 99383961
14 2250472801
15 27333591309
16 635688426842
17 8878319017022
18 215812184750821
19 3416973303551969
20 87455366666951644
21 1550782738938548075
22 41903722165381482287
23 823596208419940694670
24 23503436481574417378942

List of values

[0, 1, 6, 254, 1835, 47673, 416221, 9565156, 99383961, 2250472801, 27333591309, 635688426842, 8878319017022, 215812184750821, 3416973303551969, 87455366666951644, 1550782738938548075, 41903722165381482287, 823596208419940694670, 23503436481574417378942]

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

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