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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.

A197190 a(0) = 2, a(n) = Lucas(phi(n^2)) for n > 0.

Table of values

n a(n)
0 2
1 1
2 3
3 18
4 47
5 15127
6 322
7 599074578
8 4870847
9 192900153618
10 228826127
11 97418273275323406890123
12 10749957122
13 400010949097364802732720796316482
14 358890350005878082
15 11981655542024930675232002
16 562882766124611619513723647
17 699259133978938420550028971714417160188479526095241271647

List of values

[2, 1, 3, 18, 47, 15127, 322, 599074578, 4870847, 192900153618, 228826127, 97418273275323406890123, 10749957122, 400010949097364802732720796316482, 358890350005878082, 11981655542024930675232002, 562882766124611619513723647, 699259133978938420550028971714417160188479526095241271647]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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