|
Search: id:A039685
|
|
|
| A039685 |
|
Numbers n such that n^2 ends in 444. |
|
+0
1
|
|
| 38, 462, 538, 962, 1038, 1462, 1538, 1962, 2038, 2462, 2538, 2962, 3038, 3462, 3538, 3962, 4038, 4462, 4538, 4962, 5038, 5462, 5538, 5962, 6038, 6462, 6538, 6962, 7038, 7462, 7538, 7962, 8038, 8462, 8538, 8962, 9038, 9462, 9538, 9962, 10038, 10462
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
No square can end in more than three 4's.
|
|
REFERENCES
|
Albert H. Beiler, "Recreations in the Theory of Numbers", Dover Publ., 2nd Ed. 1966, Chapter XV, "On The Square", p. 139. ISBN 0-486-21096-0.
David Wells, "Curious and Interesting Numbers", Revised Ed. Penguin Books, p. 152. ISBN 0-14-026149-4.
|
|
FORMULA
|
a(2n+1)=500n+38 and a(2n+2)=500n-38.
|
|
MATHEMATICA
|
Drop[ Flatten[ Table[{500n-38, 500n+38}, {n, 0, 21}]], 1] (from Robert G. Wilson v Nov 27 2004)
|
|
CROSSREFS
|
Sequence in context: A156661 A155193 A159943 this_sequence A006418 A160317 A088891
Adjacent sequences: A039682 A039683 A039684 this_sequence A039686 A039687 A039688
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
Felice Russo (felice.russo(AT)katamail.com)
|
|
EXTENSIONS
|
More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1999.
|
|
|
Search completed in 0.002 seconds
|
