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Search: id:A048350
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| A048350 |
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a(n)^2 is the smallest square containing exactly n 5's. |
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+0
2
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| 5, 75, 235, 745, 22485, 22925, 235065, 505525, 2356384, 23569166, 227069495, 674919666, 3931354166, 7450205075, 39969432765, 524933839166
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Eric Weisstein's World of Mathematics, Square Number
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MATHEMATICA
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k := 1; For[n = 1, n < 30000, n++, If[DigitCount[n^2][[5]] == k, k++; Print[n]]] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 09 2006
a[n_] := Module[{i = 1}, While[DigitCount[i^2][[6]] != n, i++; ]; i]; - Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 20 2006
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CROSSREFS
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Cf. A036512, A034986, A048351.
Sequence in context: A126740 A080473 A156703 this_sequence A030991 A151752 A127212
Adjacent sequences: A048347 A048348 A048349 this_sequence A048351 A048352 A048353
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KEYWORD
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nonn,base,more
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 1999.
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EXTENSIONS
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More terms from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Jan 14 2009
One more term from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Jan 25 2009
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