0,2

The Hankel transform of this sequence is 20^C(n+1,2) .

a(n) = Sum_{k, 0<=k<=n}A086810(n,k)*4^k .

Sequence in context: A138736 A019999 A002894 this_sequence A132864 A052700 A136224

Adjacent sequences: A131762 A131763 A131764 this_sequence A131766 A131767 A131768

nonn

Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 29 2007