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.

A317283 Number of permutations of [n] with exactly three increasing runs of even length.

Table of values

n a(n)
6 61
7 906
8 8965
9 94398
10 1088575
11 12625694
12 150890533
13 1914036434
14 25485825638
15 353702731940
16 5141233861254
17 78259458749608
18 1243051438276365
19 20579839942072222
20 354951501710697119
21 6367683567830126402
22 118640486378324764141
23 2293339890430027143606

List of values

[61, 906, 8965, 94398, 1088575, 12625694, 150890533, 1914036434, 25485825638, 353702731940, 5141233861254, 78259458749608, 1243051438276365, 20579839942072222, 354951501710697119, 6367683567830126402, 118640486378324764141, 2293339890430027143606]

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

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