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.

A101189 G.f. A(x) is defined as the limit A(x) = lim_{n->oo} F(n)^(1/2^(n-1)) where F(n) is defined by F(n) = F(n-1)^2 + (2*x)^(2^n-1) for n >= 1 with F(0) = 1.

Table of values

n a(n)
0 1
1 2
2 0
3 4
4 -8
5 16
6 -40
7 144
8 -512
9 1696
10 -5696
11 19840
12 -70048
13 247744
14 -880128
15 3152768
16 -11386624
17 41389568
18 -151273728
19 555794944
20 -2052141056
21 7610274816
22 -28331018240
23 105833345024
24 -396594444800
25 1490425179136
26 -5615651143680
27 21209004267520
28 -80276663808000

List of values

[1, 2, 0, 4, -8, 16, -40, 144, -512, 1696, -5696, 19840, -70048, 247744, -880128, 3152768, -11386624, 41389568, -151273728, 555794944, -2052141056, 7610274816, -28331018240, 105833345024, -396594444800, 1490425179136, -5615651143680, 21209004267520, -80276663808000]