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!)
A037021 Greedy sequence such that no term is the average of four others. 0
0, 1, 2, 3, 5, 7, 13, 26, 27, 28, 29, 31, 122, 123, 124, 125, 127, 129, 135, 148, 149, 150, 151, 153, 610, 611, 612, 613, 615, 617, 623, 636, 637, 638, 639, 641, 732, 733, 734, 735, 737, 739, 745, 758, 759, 760, 761, 763, 3050, 3051 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

Related to R. K. Guy, Unsolved Problems in Number Theory, Section C16.

LINKS

Table of n, a(n) for n=1..50.

D. Tseng, Generalized nonaveraging integer sequences, Integers 12 (2012), no. 2, 275-300.

FORMULA

Terms are integers of the form 122A+R, where A has 0's and 1's in its base 5 expansion, and R is in the set {0, 1, 2, 3, 5, 7, 13, 26, 27, 28, 29, 31}. - Dennis Tseng, Jul 19 2013

CROSSREFS

Sequence in context: A227627 A335116 A135372 * A114741 A096177 A075238

Adjacent sequences:  A037018 A037019 A037020 * A037022 A037023 A037024

KEYWORD

nonn

AUTHOR

John W. Layman

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 May 18 15:25 EDT 2021. Contains 343995 sequences. (Running on oeis4.)