A181659 Numbers at which the sum of the iterated totient function (A092693) attains a record.
1, 2, 3, 5, 7, 11, 13, 17, 23, 29, 37, 41, 47, 53, 59, 71, 73, 79, 83, 89, 101, 107, 131, 137, 167, 179, 227, 233, 257, 289, 317, 347, 359, 389, 443, 449, 461, 467, 503, 557, 563, 569, 587, 641, 719, 809, 839, 857, 929, 977, 983, 1013, 1019, 1097, 1187, 1193, 1283
Offset: 1
Keywords
Links
- T. D. Noe, Table of n, a(n) for n=1..1000
Programs
-
Mathematica
kMax=2*3*5*7*11*13; t=Table[0,{kMax}]; Do[e=EulerPhi[k]; t[[k]]=e+t[[e]], {k,2,kMax}]; mx=-1; Reap[Do[If[t[[k]]>mx, mx=t[[k]]; Sow[k]], {k,kMax}]][[2,1]]
Comments