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n times n+9 gives the concatenation of two numbers m and m+2.
4

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

%S 3349727,3922992,6077000,6650265,4076746044440402197,

%T 5923253955559597795,7713109680804038561,33652275100997044455421,

%U 66347724899002955544571,74261393963751156983420

%N n times n+9 gives the concatenation of two numbers m and m+2.

%e 6650265 * 6650274 = 4422608//4422610, where // denotes

%e concatenation.

%Y Cf. A116175, A116300, A116305, A116313.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006