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.

A321066 Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=10.

Table of values

n a(n)
10 1035227008
11 48904686848
12 2945846638464
13 218405906177792
14 19438574276705792
15 2038137238577944576
16 248048061418810109952
17 34621419911316556017664
18 5486719044572824902107136
19 978934483626207520876986368
20 195206678980725195413273903104

List of values

[1035227008, 48904686848, 2945846638464, 218405906177792, 19438574276705792, 2038137238577944576, 248048061418810109952, 34621419911316556017664, 5486719044572824902107136, 978934483626207520876986368, 195206678980725195413273903104]

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

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