2,1

See A060344 for the corresponding result for Lie groups of type A_n.

Michael Gekhtman et al., The number of connected components in the double Bruhat cells for nonsimply-laced groups.

a(2) = 8, a(3) = 30 and a(n) = (n+5)*2^(n-1) for n >= 4.

Cf. A060344.

Sequence in context: A092277 A008469 A004639 this_sequence A055832 A100175 A063489

Adjacent sequences: A131766 A131767 A131768 this_sequence A131770 A131771 A131772

easy,nonn

Peter Bala (pbala(AT)toucansurf.com), Jul 14 2007