One day, one decomposition
A179188: Numbers n such that phi(n) = phi(n+6), with Euler's totient function phi=A000010
3D graph, threejs - webGL https://decompwlj.com/3Dgraph/A179188.html
2D graph, first 500 terms https://decompwlj.com/2Dgraph500terms/A179188.html