0,2
Table of n, a(n) for n=0..8.
1/8*(5^(n^2)+2*5^(n^2/4)+3*5^(n^2/2)+2*5^((n^2+n)/2)) if n is even and 1/8*(5^(n^2)+2*5^((n^2+3)/4)+5^((n^2+1)/2)+4*5^((n^2+n)/2)) if n is odd.
Cf. A054247.
Sequence in context: A099123 A097993 A172806 * A128275 A028448 A108791
Adjacent sequences: A054749 A054750 A054751 * A054753 A054754 A054755
easy,nonn
Vladeta Jovovic, May 15 2000
approved
