|
Search: id:A068075
|
|
|
| A068075 |
|
Lesser of a primitive pair such that n and its 10's complement are simultaneously square. |
|
+0
2
|
|
| 1, 36, 324, 123904, 3968064, 28901376, 14997431296, 434207195136, 2552428007424, 1780607738773504
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
If k is in the sequence so is k * 100^m.
|
|
MATHEMATICA
|
Do[ If[n^2 <= 5*10^Floor[ Log[10, n^2]] && IntegerQ[ Sqrt[ 10^Floor[ Log[10, n^2] + 1] - n^2]] && Take[ IntegerDigits[n^2], -1] != {0}, Print[n^2]], {n, 1, 4*10^6}]
|
|
CROSSREFS
|
Cf. A068810.
Sequence in context: A017594 A014800 A067473 this_sequence A053136 A000821 A071232
Adjacent sequences: A068072 A068073 A068074 this_sequence A068076 A068077 A068078
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 20 2002
|
|
|
Search completed in 0.002 seconds
|
