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.

A321059 Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=3.

Table of values

n a(n)
3 2
4 8
5 64
6 852
7 17008
8 467696
9 16860608
10 769534688
11 43316046592
12 2945846638464
13 238048843712512
14 22542120635302912
15 2472277850712350720
16 310880199760083564032
17 44429722692959679590400
18 7161345941202962487965696
19 1292988538929694918729072640

List of values

[2, 8, 64, 852, 17008, 467696, 16860608, 769534688, 43316046592, 2945846638464, 238048843712512, 22542120635302912, 2472277850712350720, 310880199760083564032, 44429722692959679590400, 7161345941202962487965696, 1292988538929694918729072640]

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

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