A130821 - OEIS

%I #6 Nov 29 2022 01:31:35

%S 1,1,3,3,3,3,5,5,5,5,5,5,7,7,7,7,7,7,7,7,9,9,9,9,9,9,9,9,9,9,11,11,11,

%T 11,11,11,11,11,11,11,11,11,13,13,13,13,13,13,13,13,13,13,13,13,13,13,

%U 15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15

%N 2n-1 appears 2n times.

%F a(n) = A131507(ceiling(n/2)-1). - _Georg Fischer_, Nov 28 2022

%Y Cf. A131507.

%K nonn

%O 1,3

%A _Paul Curtz_, Jul 17 2007