1,2
Table of n, a(n) for n=1..105.
Hongwei Chen and G. C. Greubel, Sum of the Reciprocals of Polygonal Numbers (Solved), SIAM Problems and solutions.
Sum_{n>=1} 2/(3n^2-n).
Equals 3*log(3) - Pi*sqrt(3)/3 = A016650 - A093602. - Michel Marcus, Jul 03 2014
1.482037501770111223591657453125421381658405425375507779634198065524359698529473...
RealDigits[ Sum[2/(3 n^2 - n), {n, 1, Infinity}], 10, 111][[1]]
Cf. A000038, A013661, A016627, A016650, A093602, A244639, A244645, A275792.
Sequence in context: A248415 A295086 A134484 * A274192 A021958 A200412
Adjacent sequences: A244638 A244639 A244640 * A244642 A244643 A244644
nonn,cons,easy
Robert G. Wilson v, Jul 03 2014
approved