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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.

A316396 Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of nine.

Table of values

n a(n)
9 1
10 9
11 2071
12 20845
13 1553153
14 17662969
15 908651571
16 11670560732
17 512693233164
18 7392808621010
19 303061463720474
20 4869546964922509
21 194661534866479194
22 3459210686800253224
23 138131753631241199208
24 2695708505172764233290
25 109038227244360661170616

List of values

[1, 9, 2071, 20845, 1553153, 17662969, 908651571, 11670560732, 512693233164, 7392808621010, 303061463720474, 4869546964922509, 194661534866479194, 3459210686800253224, 138131753631241199208, 2695708505172764233290, 109038227244360661170616]

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

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