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.

A337505 Number of sequences of length 2*n covering an initial interval of positive integers and splitting into n maximal anti-runs.

Table of values

n a(n)
0 1
1 2
2 24
3 440
4 10780
5 329112
6 12006456
7 508903824
8 24559486380
9 1328964785720
10 79670488601704
11 5240336913228144
12 375167786246499064
13 29038998659140223600
14 2416268289647552828400
15 215068032231876851531040
16 20389611819955706893052460
17 2051184695261785540782403320

List of values

[1, 2, 24, 440, 10780, 329112, 12006456, 508903824, 24559486380, 1328964785720, 79670488601704, 5240336913228144, 375167786246499064, 29038998659140223600, 2416268289647552828400, 215068032231876851531040, 20389611819955706893052460, 2051184695261785540782403320]

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

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