One day, one decomposition
A096887: Initial values for f(x)=phi(sigma(x)) such that iteration of f ends in cycle of length=2
3D graph, threejs - webGL https://decompwlj.com/3Dgraph/A096887.html
2D graph, first 500 terms https://decompwlj.com/2Dgraph500terms/A096887.html