

A258716


Decimal expansion of 3 + 2*Sum_{k>=0} 1/Product_{i=0..k} (2^(2^i)  1).


2



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

1,1


LINKS

Table of n, a(n) for n=1..80.
Gary W. Adamson and N. J. A. Sloane, Correspondence, May 1994, including Adamson's MSS "Algorithm for Generating nth Row of Pascal's Triangle, mod 2, from n", and "The Tower of Hanoi Wheel". Defines this number.


FORMULA

Equals 3 + A258715.


EXAMPLE

5.7112854057096334466665254291814791046797658771989754...


CROSSREFS

Cf. A258714, A258715.
Sequence in context: A133412 A111833 A011378 * A195300 A019697 A217173
Adjacent sequences: A258713 A258714 A258715 * A258717 A258718 A258719


KEYWORD

nonn,cons


AUTHOR

N. J. A. Sloane, Jun 15 2015


STATUS

approved



