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A095966 Numbers k such that k * (largest digit of k) is a square. 0
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 18, 45, 49, 100, 125, 128, 144, 169, 175, 196, 200, 216, 245, 288, 289, 300, 324, 338, 400, 405, 441, 500, 529, 567, 578, 600, 648, 700, 729, 800, 882, 900, 961, 1024, 1058, 1089, 1125, 1296, 1323, 1369, 1372, 1444, 1445, 1458 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
EXAMPLE
18 is a term because 18*8 = 144 = 12^2.
MATHEMATICA
Select[Range[0, 1500], IntegerQ[Sqrt[# Max[IntegerDigits[#]]]]&] (* Harvey P. Dale, Aug 30 2016 *)
CROSSREFS
Cf. A054055.
Sequence in context: A273736 A048409 A066565 * A180084 A092596 A349732
KEYWORD
base,easy,nonn
AUTHOR
Jason Earls, Jul 15 2004
STATUS
approved

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Last modified June 13 23:50 EDT 2024. Contains 373391 sequences. (Running on oeis4.)