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.

A321060 Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=4.

Table of values

n a(n)
4 10
5 68
6 852
7 16328
8 438496
9 15608288
10 707767328
11 39729927744
12 2700561836672
13 218405906177792
14 20715182759975936
15 2276573425946788864
16 286926691657095745024
17 41104621803491951127552
18 6641412815937114696669184
19 1201977736831477123144658944

List of values

[10, 68, 852, 16328, 438496, 15608288, 707767328, 39729927744, 2700561836672, 218405906177792, 20715182759975936, 2276573425946788864, 286926691657095745024, 41104621803491951127552, 6641412815937114696669184, 1201977736831477123144658944]

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

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