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A030134
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a(n)^2 has last digit equal to the sum of the other digits.
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1
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27, 33, 35, 55, 57, 123, 145, 147, 153, 177, 453, 1497, 3747, 3873, 4497, 4797, 10203, 10503, 31623, 1002003, 1005003, 100020003, 100050003, 10000200003, 10000500003, 1000002000003, 1000005000003, 100000020000003
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OFFSET
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0,1
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LINKS
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FORMULA
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Sequence includes both 10^(2n) + 2*10^n + 3 and 10^(2n) + 5*10^n + 3 for n >= 2.
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MATHEMATICA
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Select[Range[10^6], First@ #1 == Total@ #2 & @@ TakeDrop[IntegerDigits[#^2], -1] &] (* Michael De Vlieger, Oct 06 2019 *)
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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George Russell (george(AT)persimmon.com)
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EXTENSIONS
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STATUS
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approved
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