1,3

The row sums are zero due to antisymmetry of each row. See A105805.

a(n)=sum( A105805(n, k), k=1..floor(p(n)/2)), with the partition numbers p(n)= A000041(n).

Sequence in context: A003318 A035300 A035296 this_sequence A066699 A087149 A090853

Adjacent sequences: A105804 A105805 A105806 this_sequence A105808 A105809 A105810

nonn,easy

Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Apr 28 2005