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.

A264553 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.

Table of values

n a(n)
1 0
2 10
3 45
4 216
5 1528
6 11728
7 66372
8 403920
9 2587588
10 16422928
11 100924052
12 627229368
13 3931197172
14 24518011160
15 152485541704
16 950191656704
17 5926384223020
18 36928044675096
19 230056295804064
20 1433703853124720

List of values

[0, 10, 45, 216, 1528, 11728, 66372, 403920, 2587588, 16422928, 100924052, 627229368, 3931197172, 24518011160, 152485541704, 950191656704, 5926384223020, 36928044675096, 230056295804064, 1433703853124720]

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

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