a(n) is the largest integer k such that sigma(k)/(d(k)*sopf(k)) = n where d=A000005, sigma=A000203 and sopf=A008472.

A328175

a(n) is the largest integer k such that sigma(k)/(d(k)*sopf(k)) = n where d=A000005, sigma=A000203 and sopf=A008472.

Terms

    a(0) =42a(1) =470a(2) =923a(3) =2159a(4) =12924a(5) =3735a(6) =4316a(7) =8786a(8) =23939a(9) =24412a(10) =76502a(11) =26768a(12) =28612a(13) =47849a(14) =145620a(15) =36002a(16) =118204a(17) =189143a(18) =116999a(19) =105657a(20) =109559a(21) =252474a(22) =142687a(23) =236860a(24) =504899a(25) =265682a(26) =388798a(27) =1558808a(28) =154559a(29) =345687

External references