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.

A090012 Permanent of (0,1)-matrix of size n X (n+d) with d=2 and n-1 zeros not on a line.

Table of values

n a(n)
1 3
2 9
3 39
4 213
5 1395
6 10617
7 91911
8 890901
9 9552387
10 112203465
11 1432413063
12 19743404469
13 292164206259
14 4619383947513
15 77708277841575
16 1385712098571957
17 26108441941918851
18 518231790473609481
19 10808479322484810087

List of values

[3, 9, 39, 213, 1395, 10617, 91911, 890901, 9552387, 112203465, 1432413063, 19743404469, 292164206259, 4619383947513, 77708277841575, 1385712098571957, 26108441941918851, 518231790473609481, 10808479322484810087]