1,2

Table of n, a(n) for n=1..80.

(See the Mathematic code.)

a=5/2; b=1/2;

F[n_]:=a*n^2+b*n;

R[n_]:=(n/a+((b-1)/(2a))^2)^(1/2);

G[n_]:=n-1+Ceiling[R[n]-(b-1)/(2a)];

Table[F[n], {n, 60}]

Table[G[n], {n, 100}]

Sequence in context: A052405 A039212 A039221 * A047573 A039246 A201997

Adjacent sequences: A183294 A183295 A183296 * A183298 A183299 A183300

nonn

Clark Kimberling, Jan 03 2011

approved