|
| |
|
|
A067500
|
|
Powers of 3 with digit sum also a power of 3.
|
|
13
| |
|
|
1, 3, 9, 27, 81, 243, 19683, 59049, 177147, 1594323, 43046721, 129140163, 10460353203, 7625597484987, 617673396283947, 50031545098999707, 150094635296999121, 4052555153018976267
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| a(n) = 3^A118872(n).
|
|
|
MATHEMATICA
| With[{l3s=3^Range[0, 200]}, Select[l3s, MemberQ[l3s, Total[IntegerDigits[ #]]]&]] (* From Harvey P. Dale, May 20 2011 *)
|
|
|
CROSSREFS
| Cf. A067499.
Cf. A004166, A000244.
Sequence in context: A133494 A050733 A079846 * A078226 A083591 A052917
Adjacent sequences: A067497 A067498 A067499 * A067501 A067502 A067503
|
|
|
KEYWORD
| base,easy,nonn
|
|
|
AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 11 2002
|
|
|
EXTENSIONS
| More terms from Harvey P. Dale (hpd1(AT)nyu.edu), Mar 02 2002
Offset corrected by Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 14 2011
|
| |
|
|
