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n times n+3 gives the concatenation of two numbers m and m-7.
4

%I #2 Mar 30 2012 17:40:40

%S 73,7248,7933,86896,95987,7450774,8912861,3546363535354546353,

%T 4635454646463635463,5364545353536364535,6453636464645453645,

%U 31993591495513432827263,39229430087220380122375

%N n times n+3 gives the concatenation of two numbers m and m-7.

%e 8912861 * 8912864 = 7943911//7943904, where // denotes

%e concatenation.

%Y Cf. A116110, A116234, A116242, A116253.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006