OFFSET
-1,2
LINKS
Paolo Xausa, Table of n, a(n) for n = -1..10000
David H. Bailey and Jonathan M. Borwein, Experimental Mathematics: Examples, Methods and Implications, Notices of the American Mathematical Society, May 2005, Vol. 52, No. 5, p. 511.
Jonathan M. Borwein, The Experimental Mathematician: the Pleasure of Discovery and the Role of Proof, International Journal of Computers for Mathematical Learning, Vol. 10 (2005), p. 98.
FORMULA
Approximately 1/81, correct to 13 digits.
EXAMPLE
0.0123456790122345679012344567901234566790123456789012345679...
MATHEMATICA
First[RealDigits[Sum[Floor[k*Tanh[Pi/2]]/10^k, {k, 150}], 10, 100]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Paolo Xausa, Jul 04 2024
STATUS
approved