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A061868 Numbers n such that n^2 has property that the sum of its digits and the product of its digits are squares (allowing zeros). 3
0, 1, 2, 3, 10, 12, 20, 21, 30, 45, 48, 51, 60, 90, 95, 100, 101, 102, 103, 104, 105, 110, 120, 122, 130, 140, 148, 150, 175, 176, 180, 200, 201, 202, 203, 210, 212, 220, 221, 230, 247, 248, 249, 257, 265, 266, 274, 283, 284, 300, 301, 302, 310, 318, 319, 321 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
MATHEMATICA
spsQ[n_]:=Module[{idn2=IntegerDigits[n^2]}, IntegerQ[Sqrt[Total[idn2]]] && IntegerQ[ Sqrt[Times@@idn2]]]; Select[Range[0, 350], spsQ] (* Harvey P. Dale, Dec 12 2013 *)
CROSSREFS
A061268 does not allow zero product of digits.
Sequence in context: A006092 A015859 A022427 * A004679 A168060 A306076
KEYWORD
base,easy,nonn
AUTHOR
Larry Reeves (larryr(AT)acm.org), May 11 2001
STATUS
approved

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Last modified May 26 11:31 EDT 2024. Contains 372824 sequences. (Running on oeis4.)