1,2

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

(See the Mathematica code.)

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

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. A115067.

Sequence in context: A206027 A039222 A340745 * A029927 A047334 A032775

Adjacent sequences: A183292 A183293 A183294 * A183296 A183297 A183298

nonn

Clark Kimberling, Jan 03 2011

approved