login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A092857 Representation of 1/sqrt(2*Pi) by an infinite sequence. 8
2, 3, 6, 7, 11, 16, 20, 22, 25, 26, 29, 30, 31, 32, 34, 36, 41, 42, 44, 45, 48, 50, 55, 59, 60, 62, 67, 68, 69, 70, 71, 72, 75, 77, 78, 81, 82, 83, 84, 88, 90, 99, 101, 102, 103, 105, 107, 109, 110, 111, 115, 116, 117, 121, 123, 124, 125, 126, 127, 128, 129, 130, 132, 135 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Any real number in the range (0,1), having infinite number of nonzero binary digits, can be represented by a monotonic infinite sequence, such a way that: n is in the sequence iff the n-th digit in the fraction part of the number is 1. See also A092855.

An example for the inverse mapping is A051006.

LINKS

Table of n, a(n) for n=1..64.

Ferenc Adorjan, Binary mapping of monotonic sequences and the Aronson function

PROG

(PARI) {/* mtinv(x)= /*Returns the inverse binary mapping of x into a monotonic sequence */ local(z, v=[], r=[], l); z=frac(x); v=binary(z)[2]; l=matsize(v)[2]; for(i=1, l, if(v[i]==1, r=concat(r, i))); return(r)} }

CROSSREFS

Cf. A051006, A092855.

Sequence in context: A179019 A096578 A027754 * A062404 A032875 A032842

Adjacent sequences:  A092854 A092855 A092856 * A092858 A092859 A092860

KEYWORD

easy,nonn

AUTHOR

Ferenc Adorjan (fadorjan(AT)freemail.hu)

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 22 12:08 EDT 2021. Contains 343177 sequences. (Running on oeis4.)