0,3

Diagonal sums of A106476.

Table of n, a(n) for n=0..59.

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

Sequence in context: A114753 A079316 A106481 * A098043 A324866 A290673

Adjacent sequences: A106474 A106475 A106476 * A106478 A106479 A106480

easy,nonn

Paul Barry, May 03 2005

approved