1,2

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

(See the Mathematica code.)

a=5/2; b=3/2;

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}]

Cf. A147875.

Sequence in context: A089590 A052406 A022306 * A081023 A165332 A031179

Adjacent sequences: A183295 A183296 A183297 * A183299 A183300 A183301

nonn

Clark Kimberling, Jan 03 2011

approved