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Search: id:A067472
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| A067472 |
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Smallest n-digit square starting with 2. |
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+0
3
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| 25, 225, 2025, 20164, 200704, 2002225, 20007729, 200024449, 2000057284, 20000182084, 200000361796, 2000001237796, 20000000402496, 200000010642496, 2000000040249600, 20000000215721449, 200000000447251216
(list; graph; listen)
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OFFSET
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2,1
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FORMULA
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a(n) = ceiling(sqrt(2*10^(n-1)))^2, n>1. - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 14 2002
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PROGRAM
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(PARI) for(n=2, 25, a=ceil(sqrt(2*10^(n-1)))^2; print(a))
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CROSSREFS
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Cf. A035069 (roots), A045785, A067479 (2..9).
Sequence in context: A065779 A095241 A061839 this_sequence A058426 A048384 A030485
Adjacent sequences: A067469 A067470 A067471 this_sequence A067473 A067474 A067475
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KEYWORD
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base,easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 09 2002
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EXTENSIONS
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More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 14 2002
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