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.

A340888 a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^2 * 4^(n-k-1) * a(k).

Table of values

n a(n)
0 1
1 1
2 8
3 124
4 3456
5 150656
6 9453056
7 807373568
8 90066059264
9 12716049596416
10 2216452086693888
11 467465806422867968
12 117332539562036035584
13 34562989958399757647872
14 11807922834511544081973248
15 4630865359842075866336067584
16 2066370767828213666946077425664

List of values

[1, 1, 8, 124, 3456, 150656, 9453056, 807373568, 90066059264, 12716049596416, 2216452086693888, 467465806422867968, 117332539562036035584, 34562989958399757647872, 11807922834511544081973248, 4630865359842075866336067584, 2066370767828213666946077425664]