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%I #9 Jul 18 2021 02:51:41
%S 87,3675,6319,8785,48742,51252,87616,3762553,6237441,9217099,
%T 3266298273,3520463763,6479536231,6733701721,8063694647,8317860137,
%U 4689524709430934473,5310475290569065521,7416797436703661746
%N Numbers k such that k*(k+7) gives the concatenation of two numbers m and m-3.
%Y Cf. A116205, A116263, A116268, A116270, A116283.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, Feb 06 2006