A305234 Number of successors of n having the same value of A001221 as n.
0, 3, 2, 1, 0, 0, 2, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 3, 2, 1, 0, 0, 2, 1, 0, 0, 0, 0, 2, 1, 0, 0, 0, 0, 2, 1, 0, 0, 4, 3, 2, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 3, 2, 1
Offset: 1
Keywords
Examples
For n = 2: 3, 4 and 5 have the same number of distinct prime divisors as 2, but 6 does not, so a(2) = 3.
Programs
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PARI
a(n) = my(k=n+1, i=0); while(omega(k)==omega(n), i++; k++); i