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.

A000486 One half of the number of permutations of [n] such that the differences have 4 runs with the same signs.

Table of values

n a(n)
5 16
6 150
7 926
8 4788
9 22548
10 100530
11 433162
12 1825296
13 7577120
14 31130190
15 126969558
16 515183724
17 2082553132
18 8395437930
19 33776903714
20 135691891272
21 544517772984
22 2183315948550
23 8748985781230
24 35043081823140
25 140313684667076

List of values

[16, 150, 926, 4788, 22548, 100530, 433162, 1825296, 7577120, 31130190, 126969558, 515183724, 2082553132, 8395437930, 33776903714, 135691891272, 544517772984, 2183315948550, 8748985781230, 35043081823140, 140313684667076]

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

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