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Concatenation of cubes in increasing order up to the n-th and then in decreasing order.
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%I #5 Dec 05 2013 19:55:06

%S 1,181,182781,1827642781,182764125642781,182764125216125642781,

%T 182764125216343216125642781,182764125216343512343216125642781,

%U 182764125216343512729512343216125642781

%N Concatenation of cubes in increasing order up to the n-th and then in decreasing order.

%K easy,nonn,base

%O 1,2

%A _Amarnath Murthy_, Dec 25 2001

%E More terms from _Sascha Kurz_, Mar 23 2002