A062402(x)=sigma(phi[x]) function is iterated; initial value=2^n; a(n)=largest term of trajectory.

A097001

A062402(x)=sigma(phi[x]) function is iterated; initial value=2^n; a(n)=largest term of trajectory.

Terms

    a(0) =2a(1) =4a(2) =12a(3) =16a(4) =72a(5) =252a(6) =312a(7) =256a(8) =1512a(9) =1860a(10) =12264a(11) =6552a(12) =26208a(13) =34200a(14) =93600a(15) =65536a(16) =833280a(17) =1116024a(18) =2239920a(19) =4464096a(20) =9865440a(21) =8124480a(22) =569540160a(23) =569540160a(28) =34696672920

External references