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!)
A038523 A minimal sequence of weights with distinct weighings, with limit of two weights per pan. 1
2, 3, 9, 25, 67, 167, 427, 966 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

Discovered by Denis Borris and Ed Pegg Jr.

LINKS

Table of n, a(n) for n=0..7.

Ed Pegg, Jr., COMMENTARY ON WEEKLY PUZZLES

EXAMPLE

The first n weights give the # of distinct combinations given in A037255. The weights 1, 3, 9, 27, 81, 243, 729 also work for this problem, but are not distinct. Further numbers are calculable.

CROSSREFS

Cf. A037255.

Sequence in context: A242271 A056198 A143742 * A096237 A309814 A177928

Adjacent sequences:  A038520 A038521 A038522 * A038524 A038525 A038526

KEYWORD

more,nice,nonn

AUTHOR

Ed Pegg Jr

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 June 24 18:46 EDT 2021. Contains 345419 sequences. (Running on oeis4.)