1,9

Also, a(n) = (sum (floor (j^2/p(n))), j = 1:p(n)-1) - floor ((p(n)-2)(p(n)-1)/3) for n >= 3.

C. H. Gribble, Table of n, a(n) for n=1,..., 348513 (i.e. for primes < 5x10^6).

a(3:) = A125616 - A076410.

Sequence in context: A247706 A247704 A127802 * A094901 A030220 A219240

Adjacent sequences: A165948 A165949 A165950 * A165952 A165953 A165954

nonn

Christopher Hunt Gribble, Oct 01 2009

a(1:2) added and cross-reference section modified by Christopher Hunt Gribble, Oct 07 2009

Comment corrected by Christopher Hunt Gribble, Oct 17 2009

Comment corrected by Christopher Hunt Gribble, Oct 29 2009

approved