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%I #4 Dec 28 2012 11:18:31
%S 66,28,46,88,36,86,18,28,26,16,18,18,26,18,58,18,96,36,16,48,16,56,36,
%T 96,16,86,36,18,18,16,28,18,86,88,36,16,86,96,46
%N Concatenation of initial and final digits of n-th perfect number.
%C Also, concatenation of A135617(n) and A094540(n).
%e a(5)=36 because the 5th perfect number A000396(5) is 33550336 and the concatenation of initial and final digits of 33550336 is 36.
%Y Cf. A000396, A073729, A135617, A094540, A138840, A138841, A138842, A138844.
%K base,nonn,less
%O 1,1
%A _Omar E. Pol_, Apr 02 2008
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