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.

A090013 Permanent of (0,1)-matrix of size n X (n+d) with d=3 and n-1 zeros not on a line.

Table of values

n a(n)
1 4
2 16
3 84
4 536
5 4004
6 34176
7 327604
8 3481096
9 40585284
10 514872176
11 7058605844
12 103969203576
13 1637182717924
14 27442553929696
15 487806792137844
16 9164718013496936
17 181446744138509444
18 3775570370986139856

List of values

[4, 16, 84, 536, 4004, 34176, 327604, 3481096, 40585284, 514872176, 7058605844, 103969203576, 1637182717924, 27442553929696, 487806792137844, 9164718013496936, 181446744138509444, 3775570370986139856]