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Duplicate of A084057.
0

%I #31 Aug 08 2019 06:40:35

%S 1,6,16,56,176,576,1856,6016,19456,62976,203776,659456,2134016,

%T 6905856,22347776,72318976,234029056,757334016,2450784256,7930904576,

%U 25664946176,83053510656,268766806016,869747654656,2814562533376,9108115685376,29474481504256

%N Duplicate of A084057.

%K dead

%O 1,2

%A _Mark Dols_, Jul 24 2009