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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.

A302898 Number of permutations of [n] having exactly five alternating descents.

Table of values

n a(n)
6 61
7 594
8 6669
9 67054
10 704834
11 7570716
12 84889638
13 992272308
14 12127342203
15 154898419006
16 2066994606155
17 28788990664242
18 418074366639272
19 6322807317984024
20 99466230062507580
21 1625658804523009416
22 27571506609797250441
23 484700416772477950602
24 8822485993502063393465

List of values

[61, 594, 6669, 67054, 704834, 7570716, 84889638, 992272308, 12127342203, 154898419006, 2066994606155, 28788990664242, 418074366639272, 6322807317984024, 99466230062507580, 1625658804523009416, 27571506609797250441, 484700416772477950602, 8822485993502063393465]

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

Content is available under The OEIS End-User License Agreement.