0,3

Diagonal sums of A100100.

a(n)=sum{k=0..floor(n/2), binomial(2n-3k-1, n-2k)}.

Sequence in context: A017942 A149344 A135489 this_sequence A149345 A149346 A149347

Adjacent sequences: A100214 A100215 A100216 this_sequence A100218 A100219 A100220

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Nov 08 2004