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!)
A006459 Number of elements in Z[ sqrt(-2) ] whose `smallest algorithm' is <= n.
(Formerly M2771)
3
1, 3, 9, 17, 31, 53, 85, 133, 197, 293, 417, 593, 849, 1193, 1661, 2291, 3139, 4299 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

No recurrence is known.

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=0..17.

H. W. Lenstra, Jr., Letter to N. J. A. Sloane, Nov. 1975

P. Samuel, About Euclidean rings, J. Alg., 19 (1971), 282-301.

CROSSREFS

Cf. A006457, A006458.

Sequence in context: A035107 A090262 A190815 * A049778 A270105 A294425

Adjacent sequences:  A006456 A006457 A006458 * A006460 A006461 A006462

KEYWORD

nonn

AUTHOR

H. W. Lenstra, 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 February 28 08:10 EST 2020. Contains 332321 sequences. (Running on oeis4.)