1,1

With offset 2, decimal expansion of 9*Pi.

9*Pi is also the surface area of a sphere whose diameter equals the square root of 9. More generally x*Pi is also the surface area of a sphere whose diameter equals the square root of x. - Omar E. Pol, Dec 22 2013

Table of n, a(n) for n=1..104.

9*Pi/10 = 2.827433388230813914616379044951552595777...

9*Pi = 28.27433388230813914616379044951552595777...

Cf. A000796, A019692, A122952, A019694, A019669, A228719, A228721, A228824 (Pi through 8*Pi).

Sequence in context: A224196 A141449 A065485 * A237889 A064912 A010698

Adjacent sequences: A229936 A229937 A229938 * A229940 A229941 A229942

nonn,cons

Omar E. Pol, Oct 06 2013

approved