|
| |
|
|
A062182
|
|
Harmonic mean of digits is 4.
|
|
0
| |
|
|
4, 36, 44, 63, 288, 346, 364, 436, 444, 463, 634, 643, 828, 882, 2488, 2666, 2848, 2884, 3366, 3446, 3464, 3636, 3644, 3663, 4288, 4346, 4364, 4436, 4444, 4463, 4634, 4643, 4828, 4882, 6266, 6336, 6344, 6363, 6434, 6443, 6626, 6633, 6662, 8248, 8284
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
MATHEMATICA
| Do[ h = IntegerDigits[n]; If[ Sort[h][[1]] != 0 && Length[h]/Apply[Plus, 1/h] == 4, Print[n]], {n, 1, 10^5}]
hm4Q[n_]:=DigitCount[n, 10, 0]==0&&HarmonicMean[IntegerDigits[n]]==4; Select[Range[9000], hm4Q] (* From Harvey P. Dale, Mar 23 2011 *)
|
|
|
CROSSREFS
| Cf. A062179-A062185, A061383-A061388, A061423-A061425.
Sequence in context: A027644 A174426 A198642 * A073771 A173618 A091722
Adjacent sequences: A062179 A062180 A062181 * A062183 A062184 A062185
|
|
|
KEYWORD
| base,easy,nonn
|
|
|
AUTHOR
| Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 12 2001
|
|
|
EXTENSIONS
| More terms from Henry Bottomley (se16(AT)btinternet.com), Jul 25 2001
|
| |
|
|
