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.

A206248 Number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having zero permanent.

Table of values

n a(n)
1 49
2 361
3 1600
4 9409
5 47089
6 258064
7 1343281
8 7198489
9 37945600
10 201895681
11 1068570721
12 5672499856
13 30061664689
14 159465247561
15 845443470400
16 4483691905729
17 23774527583569
18 126075439502224
19 668536407557041

List of values

[49, 361, 1600, 9409, 47089, 258064, 1343281, 7198489, 37945600, 201895681, 1068570721, 5672499856, 30061664689, 159465247561, 845443470400, 4483691905729, 23774527583569, 126075439502224, 668536407557041]

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

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