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A169892 Ordinary sum of {numbers i in the range 1 <= i <= n such that there is a number j in the range 1 <= j <= n for which the carryless product i*j equals n}. 2

%I #7 Mar 30 2012 17:38:11

%S 1,3,4,7,19,22,8,49,20,11,12,13,14,15,16,17,18,19,20,76,22,82,24,88,

%T 26,121,28,129,30,44,52,50,48,56,54,52,60,58,56,277,72,303,80,299,78,

%U 362,76,360,84,1415,52,53,108,114,1614,175,178,240,240,1030,150,1094,144,1108

%N Ordinary sum of {numbers i in the range 1 <= i <= n such that there is a number j in the range 1 <= j <= n for which the carryless product i*j equals n}.

%C Counted with multiplicity.

%H <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a>

%Y Cf. A000203, A169891, A169893, A169987-A169899.

%K nonn,base

%O 1,2

%A _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jul 06 2010

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Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)