A161358 - OEIS

%I #5 Mar 31 2012 12:35:30

%S 1,1,2,2,3,3,3,3,3,4,3,4,5,4,5,4,5,5,5,5,6,5,5,6,7,6,6,7,6,6,7,7,6,7,

%T 7,8,7,7,7,8,9,7,8,8,9,7,8,8,9,9,8,8,7,9,10,8,9,9,9,10,11,9,9,10,10,

%U 11,9,9,10,10,11,11,10,10,10,11,11,12,10,10,9,11,11,12,13,9,11,11,12,12,13,11,11,11,12,12

%N Shorter side (x) of inner rectangle described in A168339.

%Y Cf. A161357, A168339. Equals A145288(n)-2.

%K nonn

%O 1,3

%A _R. H. Hardin_ and _N. J. A. Sloane_, Nov 27 2009

%E Corrected definition and flipped sign in the formula - _R. J. Mathar_, Mar 06 2010