OFFSET
0,1
COMMENTS
a(n) = A005117(10^n+1).
a(n)/10^n converges to Pi^2/6 = zeta(2) as n -> oo. - Chai Wah Wu, Jul 21 2024
REFERENCES
J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 165, pp 53, Ellipses, Paris 2008.
CROSSREFS
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Jul 15 2008
EXTENSIONS
a(10)-a(12) from Donovan Johnson, Nov 06 2010
a(13)-a(18) from Robert Gerbicz, Nov 22 2010
a(19)-a(21) from Chai Wah Wu, Aug 07 2024
STATUS
approved