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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.

A316397 Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of ten.

Table of values

n a(n)
10 1
11 10
12 4127
13 45562
14 4719041
15 58003461
16 3795919780
17 52052335254
18 2772611610514
19 42268105493955
20 2037044419366071
21 34333238955892416
22 1578674337291922196
23 29239755067140936242
24 1321207703588407017510
25 26733500408009431631728
26 1208079945873987947779946

List of values

[1, 10, 4127, 45562, 4719041, 58003461, 3795919780, 52052335254, 2772611610514, 42268105493955, 2037044419366071, 34333238955892416, 1578674337291922196, 29239755067140936242, 1321207703588407017510, 26733500408009431631728, 1208079945873987947779946]

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

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