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.

A118188 Column 0 of the matrix inverse of triangle A118185(n,k) = (4^k)^(n-k).

Table of values

n a(n)
0 1
1 -1
2 3
3 -33
4 1407
5 -237057
6 158992383
7 -425715556353
8 4556004503093247
9 -194971932801554579457
10 33370662957719457037287423
11 -22845215336421444625717664940033
12 62557106610069521429900219032249827327
13 -685195337175488637158242110253091749621661697

List of values

[1, -1, 3, -33, 1407, -237057, 158992383, -425715556353, 4556004503093247, -194971932801554579457, 33370662957719457037287423, -22845215336421444625717664940033, 62557106610069521429900219032249827327, -685195337175488637158242110253091749621661697]