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.

A317284 Number of permutations of [n] with exactly four increasing runs of even length.

Table of values

n a(n)
8 1385
9 31493
10 460929
11 6632158
12 99592344
13 1489928080
14 22566676855
15 354404597721
16 5758011600442
17 96477356811365
18 1673128285327455
19 30065282456829860
20 558998263719383722
21 10749166166477149832
22 213755085162112473899
23 4392507334767609209209
24 93197430506980061714657

List of values

[1385, 31493, 460929, 6632158, 99592344, 1489928080, 22566676855, 354404597721, 5758011600442, 96477356811365, 1673128285327455, 30065282456829860, 558998263719383722, 10749166166477149832, 213755085162112473899, 4392507334767609209209, 93197430506980061714657]

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

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