0,2

First column of A125694.

a(n)=0^n+2*sum{k=0..floor((n-1)/2), C(n-1,2k)*C(k)*(-1)^(n-k-1)*2^k}, C(n)=A000108(n).

Cf. A091593.

Adjacent sequences: A125692 A125693 A125694 this_sequence A125696 A125697 A125698

Sequence in context: A060804 A086364 A091185 this_sequence A138674 A122946 A087628

easy,sign

Paul Barry (pbarry(AT)wit.ie), Nov 30 2006