If D[n] is divisor-set of n, then in set of 1+D only 2 primes occur:{2,3}; also n is not squarefree.
A072607
If D[n] is divisor-set of n, then in set of 1+D only 2 primes occur:{2,3}; also n is not squarefree.
Terms
- a(0) =98a(1) =338a(2) =578a(3) =686a(4) =722a(5) =1274a(6) =1862a(7) =1922a(8) =2366a(9) =2738a(10) =3038a(11) =3626a(12) =3698a(13) =4214a(14) =4394a(15) =4418a(16) =4802a(17) =5054a(18) =5978a(19) =6422a(20) =6566a(21) =6962a(22) =7154a(23) =7442a(24) =7742a(25) =8918a(26) =8978a(27) =9386a(28) =9506a(29) =9826
External references
- oeis: A072607