A374323 - OEIS

A374323

Decimal expansion of Sum_{k >= 1} A372822(k)/10^k.

1, 2, 3, 4, 5, 6, 7, 9, 0, 1, 2, 2, 3, 4, 5, 6, 7, 9, 0, 1, 2, 3, 4, 4, 5, 6, 7, 9, 0, 1, 2, 3, 4, 5, 6, 6, 7, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 9, 0, 1, 1, 2, 3, 4, 5, 6, 7, 9, 0, 1, 2, 3, 3, 4, 5, 6, 7, 9, 0, 1, 2, 3, 4, 5, 5, 6, 7, 9, 0, 1, 2

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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

Cf. A367960, A372822.

Sequence in context: A228052 A308072 A084689 * A021085 A031006 A031978

Adjacent sequences: A374320 A374321 A374322 * A374324 A374325 A374326

KEYWORD

nonn,cons

AUTHOR

Paolo Xausa, Jul 04 2024

STATUS

approved