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Array read by rows in which the n-th row contains smallest odd numbers in increasing order of all possible prime signatures with n divisors.
5

%I #3 Mar 30 2012 17:29:51

%S 1,3,9,15,27,81,45,243,729,105,135,2187,225,6561,405,19683,59049,315,

%T 675,1215,177147,531441,3645,1594323,2025,4782969,945,1155,3375,10935,

%U 14348907,43046721,1575,6075,32805,129140163,387420489,2835,10125,98415

%N Array read by rows in which the n-th row contains smallest odd numbers in increasing order of all possible prime signatures with n divisors.

%C n-th row contains A001055(n) terms.

%C First item of each row gives A038547.

%e Table begins:

%e 1,

%e 3,

%e 9,

%e 15,27,

%e 81,

%e 45,243,

%e 729,

%e 105,135,2187,

%e ...

%Y Cf. A001055, A038547, A077569.

%K nonn,tabf

%O 1,2

%A _Ray Chandler_, Sep 22 2006