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A054259
Squares having last digit equal to the sum of the other digits.
1
729, 1089, 1225, 3025, 3249, 15129, 21025, 21609, 23409, 31329, 205209, 2241009, 14040009, 15000129, 20223009, 23011209, 104101209, 110313009, 1000014129, 1004010012009, 1010031030009, 10004001000120009, 10010003100300009
OFFSET
1,1
FORMULA
a(n) = A030134(n)^2. - Andrew Howroyd, Aug 13 2024
MATHEMATICA
Select[Range[101*10^6]^2, Length[Union[Total/@TakeDrop[IntegerDigits[#], -1]]] == 1&] (* Harvey P. Dale, Aug 26 2019 *)
CROSSREFS
Cf. A030134.
Sequence in context: A214106 A045791 A088035 * A202455 A046319 A119710
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Feb 15 2000
EXTENSIONS
Offset changed by Andrew Howroyd, Aug 13 2024
STATUS
approved