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n times n+1 gives the concatenation of two numbers m and m-5.
4

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

%S 8,74,7249,7934,86897,95988,7450775,8912862,3546363535354546354,

%T 4635454646463635464,5364545353536364536,6453636464645453646,

%U 31993591495513432827264,39229430087220380122376

%N n times n+1 gives the concatenation of two numbers m and m-5.

%e 8912862 * 8912863 = 7943911//7943906, where // denotes

%e concatenation.

%Y Cf. A116120, A116246, A116252, A116265.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006