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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; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = 3^A118872(n).

LINKS

Table of n, a(n) for n=1..18.

MATHEMATICA

With[{l3s=3^Range[0, 200]}, Select[l3s, MemberQ[l3s, Total[IntegerDigits[ #]]]&]] (* Harvey P. Dale, May 20 2011 *)

CROSSREFS

Cf. A067499.

Cf. A004166, A000244.

Sequence in context: A050733 A238939 A079846 * A273898 A078226 A083591

Adjacent sequences:  A067497 A067498 A067499 * A067501 A067502 A067503

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Feb 11 2002

EXTENSIONS

More terms from Harvey P. Dale, Mar 02 2002

Offset corrected by Reinhard Zumkeller, May 14 2011

STATUS

approved

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Last modified November 19 22:34 EST 2019. Contains 329323 sequences. (Running on oeis4.)