> A073694

Why stop at such small values?

> Sequence: 5,32,50,162,512,1984,2450

> Name: n such that the number of divisors of n

> = number of anti-divisors of n.

It takes little time to go up to n=10^5.

By brute force:

{A(n)=local(o);o=n;while(o%2==0,o=o/2);

sigma(2*n+1,0)+sigma(2*n-1,0)+sigma(o,0)-5}

for(n=1,10^5,if(A(n)==sigma(n,0),print(n)))

5

32

50

162

512

1984

2450

3784

5408

7564

9248

15488

19208

22684

26680

30752

53792

79600

85698

Good bye!