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A182628 Triangle T(n,k) read by rows in which row n lists the number of digits of the binary expansion of the divisors of n. 2

%I #10 Feb 03 2019 17:15:47

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

%T 4,1,4,1,2,3,4,1,2,3,4,1,2,3,4,5,1,5,1,2,2,3,4,5,1,5,1,2,3,3,4,5,1,2,

%U 3,5,1,2,4,5,1,5,1,2,2

%N Triangle T(n,k) read by rows in which row n lists the number of digits of the binary expansion of the divisors of n.

%C Row n lists the number of digits of the numbers in the n-th row of triangle A182620.

%H Nathaniel Johnston, <a href="/A182628/b182628.txt">Table of n, a(n) for n = 1..10000</a>

%e Triangle begins:

%e 1,

%e 1, 2,

%e 1, 2,

%e 1, 2, 3,

%e 1, 3,

%e 1, 2, 2, 3,

%e 1, 3,

%e 1, 2, 3, 4,

%e 1, 2, 4,

%e 1, 2, 3, 4,

%e 1, 4,

%e 1, 2, 2, 3, 3, 4,

%p with(numtheory):for n from 1 to 12 do for d in divisors(n) do printf("%d, ",length(convert(convert(d, binary),string))); od:printf("\n"); od: # _Nathaniel Johnston_, Apr 19 2011

%Y Cf. A182620, A182621, A182622.

%Y Row sums give A182627.

%K nonn,base,easy,tabf

%O 1,3

%A _Omar E. Pol_, Nov 23 2010

%E a(38)-a(79) from _Nathaniel Johnston_, Apr 19 2011

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)