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.

A337193 Total number of inversions in all permutations of [n] where the descent set equals the subset of odd elements in [n-1].

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 18
5 80
6 495
7 2856
8 20244
9 142848
10 1167885
11 9729280
12 90858438
13 872361984
14 9193900443
15 99947258880
16 1175452387560
17 14270843322368
18 185456745850329
19 2487099677147136
20 35413726451731770
21 519907295578030080
22 8052572864648861703
23 128451121643116822528

List of values

[0, 0, 1, 3, 18, 80, 495, 2856, 20244, 142848, 1167885, 9729280, 90858438, 872361984, 9193900443, 99947258880, 1175452387560, 14270843322368, 185456745850329, 2487099677147136, 35413726451731770, 519907295578030080, 8052572864648861703, 128451121643116822528]

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

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