Number of extreme points of the set of n X n symmetric doubly-stochastic matrices.

A006847

Number of extreme points of the set of n X n symmetric doubly-stochastic matrices.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =58a(6) =238a(7) =1516a(8) =9020a(9) =79892a(10) =635984a(11) =7127764a(12) =70757968a(13) =949723600a(14) =11260506056a(15) =175400319992

External references