A006459 Number of elements in Z[ sqrt(-2) ] whose 'smallest algorithm' is <= n. (Formerly M2771)

1, 3, 9, 17, 31, 53, 85, 133, 197, 293, 417, 593, 849, 1193, 1661, 2291, 3139, 4299

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 * A349489 A049778 A270105

Adjacent sequences: A006456 A006457 A006458 * A006460 A006461 A006462

Keyword

nonn,more

Author

H. W. Lenstra, Jr.

Status

approved