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.

A341255 Let f(n) = floor(r*floor(r*n)) = A341254(n), where r = (2 + sqrt(5))/2. Let a(1) = 1. Then a(n) = f(a(n-1)) for n >= 2.

Table of values

n a(n)
1 1
2 4
3 16
4 69
5 309
6 1385
7 6212
8 27866
9 125008
10 560793
11 2515754
12 11285842
13 50629052
14 227125366
15 1018899829
16 4570853893
17 20505161277
18 91987547377
19 412662390616
20 1851231536059
21 8304750512850
22 37255675336820
23 167131492108634
24 749763234780300
25 3363488838254558

List of values

[1, 4, 16, 69, 309, 1385, 6212, 27866, 125008, 560793, 2515754, 11285842, 50629052, 227125366, 1018899829, 4570853893, 20505161277, 91987547377, 412662390616, 1851231536059, 8304750512850, 37255675336820, 167131492108634, 749763234780300, 3363488838254558]