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Table of n, a(n) for n=1..42.
Number of distinct prime divisors of 2 is 1 - which is the first term.
Number of distinct prime divisors of 24 is 2 - which is the second term.
Number of distinct prime divisors of 246 is 3 - which is the third term.
Sequence in context: A007967 A054494 A112764 * A302170 A049805 A104887
Adjacent sequences: A108725 A108726 A108727 * A108729 A108730 A108731
Parthasarathy Nambi, Jun 21 2005