0,2

Partial sums of A085351. Convolution of A034478 and 4^n. Convolution of A047849 and 5^n. a(n)=A097162(2n+1)/3. Third binomial transform of A097164.

a(n)=5*5^n/2-4*4^n/3-1/6; a(n)=sum{k=0..n, (5^k+1)4^(n-k)/2}; a(n)=sum{k=0..n, (4^k+2)5^(n-k)/3}; a(n)=10a(n-1)-29a(n-2)+20a(n-3).

Sequence in context: A084779 A081625 A144635 this_sequence A152268 A026002 A057009

Adjacent sequences: A097162 A097163 A097164 this_sequence A097166 A097167 A097168

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Jul 30 2004