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A133702 A051731 * A023136. 2

%I

%S 1,2,4,3,4,8,4,4,9,8,4,12,4,8,16,5,6,18,4,12,16,8,4,16,9,8,16,12,4,32,

%T 8,6,16,12,16,27,4,8,16,16,6,32,8,12,36,8,4,20,9,18,24,12,4,32,16,16,

%U 16,8,4,48,4,16,44,7,20,32,4,18,16,32,4,36,10,8,36,12,16,32,4,20,25,12,4,48

%N A051731 * A023136.

%C A023136 = (1, 1, 3, 1, 3, 3, 3, 1, 5, 3,...)

%F Inverse Mobius transform of A023136.

%e a(4) = 3 = (1, 1, 0, 1) * (1, 1, 3, 1) = (1, 1, 0, 1), row 4 of triangle A133701.

%Y Cf. A051731, A133698, A023136.

%K nonn

%O 1,2

%A _Gary W. Adamson_, Sep 21 2007

%E More terms from _R. J. Mathar_, Jan 19 2009

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Last modified July 26 22:10 EDT 2021. Contains 346300 sequences. (Running on oeis4.)