|
| |
|
|
A048350
|
|
a(n)^2 is the smallest square containing exactly n 5's.
|
|
1
| |
|
|
5, 75, 235, 745, 22485, 22925, 235065, 505525, 2356384, 23569166, 227069495, 674919666, 3931354166, 7450205075, 39969432765, 524933839166
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
LINKS
| Eric Weisstein's World of Mathematics, Square Number
|
|
|
MATHEMATICA
| 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
|
|
|
CROSSREFS
| Cf. A036512, A034986, A048351.
Sequence in context: A192564 A080473 A156703 * A030991 A151752 A127212
Adjacent sequences: A048347 A048348 A048349 * A048351 A048352 A048353
|
|
|
KEYWORD
| nonn,base,more
|
|
|
AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 1999.
|
|
|
EXTENSIONS
| 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
|
| |
|
|
