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A140223 Triangle: Row n contains (d(1),d(2),...,d(n)) in non-descending order, where d(n) = A000005(n). 2

%I #8 Mar 11 2014 01:32:25

%S 1,1,2,1,2,2,1,2,2,3,1,2,2,2,3,1,2,2,2,3,4,1,2,2,2,2,3,4,1,2,2,2,2,3,

%T 4,4,1,2,2,2,2,3,3,4,4,1,2,2,2,2,3,3,4,4,4,1,2,2,2,2,2,3,3,4,4,4,1,2,

%U 2,2,2,2,3,3,4,4,4,6,1,2,2,2,2,2,2,3,3,4,4,4,6,1,2,2,2,2,2,2,3,3,4,4,4,4,6

%N Triangle: Row n contains (d(1),d(2),...,d(n)) in non-descending order, where d(n) = A000005(n).

%e The sequence of the numbers of divisors of the first 12 positive integers is: 1,2,2,3,2,4,2,4,3,4,2,6.

%e Rearranging these into a non-descending sequence gets row-12 of the triangle: 1,2,2,2,2,2,3,3,4,4,4,6.

%Y Cf. A000005, A140224, A140225.

%K nonn,tabl

%O 1,3

%A _Leroy Quet_, May 12 2008

%E Extended by _Ray Chandler_, Jun 26 2009

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Last modified June 7 18:53 EDT 2024. Contains 373206 sequences. (Running on oeis4.)