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.

A334775 Number of permutations of 2 indistinguishable copies of 1..n with exactly n local maxima.

Table of values

n a(n)
1 1
2 3
3 24
4 339
5 7392
6 230217
7 9689934
8 529634931
9 36463272996
10 3086776079745
11 315108659732034
12 38170141911313467
13 5412679282489599840
14 888197438344278978537
15 166988574370806672234630
16 35659091146526471860555587
17 8583030980293328579564829948
18 2312892203852608268226402385617

List of values

[1, 3, 24, 339, 7392, 230217, 9689934, 529634931, 36463272996, 3086776079745, 315108659732034, 38170141911313467, 5412679282489599840, 888197438344278978537, 166988574370806672234630, 35659091146526471860555587, 8583030980293328579564829948, 2312892203852608268226402385617]

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

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